Index

Abbe , Cleveland , 496 , 497 ofsound , 144 , C . G ., 140 , 145 Analysis of Meteor Crater ore , 40 ABC of Electricity , 356 , John A ., 284 , 285 . 288 , ABC of X ray , 356 289 , 489 Acheson , Edward G ., 330 Anecdotal History of Sound . 379 Acyclic dynamo , 87 Annealing . auto , 120 , Comfort , 118 , 119 , 137 Anthracite cooker , 190 , 191 Adams , W . S ., 468 , 473 Anti - gas fan , 17 Advertising signs, outdoor , 147 Apolic force . 149 Aerodrome , 347 Application of Induced Currents , 236 Aerodromic experiments , 61 , 62 Applied Science School , joint Harvard Aerodynamic experiments , 61 and MIT ~ 414 - 416 Air , blast device , 518 Applied Science ~ School of ~ Harvard blast switch , 425 University ~ 415 -416 bubble and quartz mirror , 256 , 257 Arc ~ divided ~ 203 ~ 204 conditioning apparatus , 193 generator ~ Thomson -Houston ~ 425 drill , electric , 427 lamp ~ 198 liquefying , 22 light system ~gold medal for ~ 208 Albany Medical College , 19 lighting ~ Gtilcher system ~ 199 Albedo , 144 , 146 welding ~ 162 -165 ~ 167 Alcohol . tax on . 97 . 100 Argon and other rare gases (of Lynn ) , 39-40 , 158 , 161 (composition of atmosphere ) ~ Allegheny College , 20 422 - 424 Alloy , ferro , 244 , 245 Armature ~ spherical ~ 207 heat resistant , 152 three coil ~ 207 Heusler , 246 ~ Professor ~ 123 magnetic , 536 Aron wattmeter ~ 8 ~ 427 nonhysteretic , 88 Arrester ~ lightning ~ 427 steel , 117 , 119 multi - gap ~ 426 heat resistant , 165 Artillery ~ fire control of ~ 469 rust resistant , 165 Asphaltum ~Trinidad ~ 110 ~ 111 shock resistant , 165 Association . See Institute ; Society Alternating current regulators , 427 Association Island ~ 336 ~ 337 Alternating Current Transformer , 236 Asteroid MT ~ 1911 ( ~ 719 ), 397 ~ Amateur observers , 142 398 American Academy of Arts and Astrologer ~ 313 Sciences . 26 Astronomical Society of France ~ 476 American Chemical Society . 49 Astrophysical Journal , 252 American Electric Company . 64 . 420 Atmosphere ~ 38 ~ 45 American Institute of Electrical acquired by planets ~ 145 Engineers . 49 . 328 . 331 . 346 Atomic ~ circuit ~ 125 American Philosophical Society . 49 hydrogen in welding ~ 163 ~ 165 fund raising . 221 Atomic Theories of Radiation . 539 American Welding Society . 158 Atophan , 406 , 408 (roof angle ) prisms . 469 - 473 Atrocities , war , 526 Ammeter . 21 Auriga . 344 Ampere . 102 . 125 Autochrome , 315 formerly . Weber . 177 plates , Lurniere , 132 Amphipleura pellucida . 312 Auto - annealing , 120 Amplification . of delicate electrical Automatic adjustment (Thomson ) , 518 impulses . 540 Automobile , electric , 113 , 421

553 INDEX

Automobile , electric (continued ) Browne , John C ., 314 engine , patent for , 84 , Catherine W ., 441 four -cylinder engine , 99 Bruce doublet , 438 street congestion due to , 152 Bruggencate , Paul , 490 Ayrton , and Perry , 16 Brush , Charles F ., 23 , 170 - 171 , 175 , Hertha Marks , 16 , 17 176 , 199 , 200 William E ., 5 , 203 , 206 Brush Company , 194 Bryan , William J., 154 Bakelite , 182 , 477 , 478 Bubble -free quartz surface , 516 Balance of payments , 393 , 394 Bucky , 79 Baldwin Locomotive Works , 318 Bulletin de la Societe A stronomique de , Sir Robert , 24 France (Ritchey - Chretien Barium , crown glass, 511 Telescope ) , 480 platino -cyanide , 370 voltameter , 11 Barker , George F ., 19 Bureau of Standards , United States , Barlow wheel , 12 , 13 493 , 510 , 512 , 535 , Professor , 458 Bureau of Weights , United States , 496 , Daniel M ., 26 Burgan dynamos, 82- Battery , electric , 75 , 124 , 126 , 173 , Burlington College, 306 174 , 226 , 228 , 27 .9 , 331 Burrell, E. P. (of Warnerand Swasey ), Barus , Carl , 120 , 121 284 , Alexander G ., 377 Businessdepression , 1930s, 344 Bell , Russian , electric welding of , 532 Bell Telephone Company , 342 Cables , underground , for distribution Bends , 542 of power , 173 Benecke (photographer ) , 443 Calcium tungstate , 366 Bennitt , E . J ., 33 California Electric Light Co ., 171 Berger and Jones , 317 Cambric , varnished , 91 Berry Transformer Company , 190 , William W., 56 , 57 , 58 , 61 , Bikini test , 78 260 , 453 , 455 Billings , (of Carnegie Institution ), 257 , Canada 's Great Telescope (Plaskett ) , 264 , 265 62 Bioscope , 228 Canyon Diablo , 31 , 37 Bitumen , 110 Canyon , Grand , 31 Blake , C . G ., 319 (goat ) , 344 Bleriot , Louis , 508 , 509 Carbolic acid in tooth , 548 Blow -out magnetic , 425 , 428 Carboloy , 181 , 182 ' Boiler , flash , 97 -99 Carbon , dioxide , 422 Bolometer , 62 , 261 electrode , 200 , 201 , 206 , 210 Bolton , Sir Francis , 194 filament , 183 Boston Evening Transcript , 503 monoxide discharge , 95 , 98 Boston Herald , 131 , 430 rods . See Carbon electrode letter by Thomson , 430 Carbonized paper , 183 , 185 Boucherot , 118 Carnegie , Andrew , 53 Bradford Corporation , 15 Foundation , 413 , William H ., 47 Institution , 257 - 262 , 264 , 266 , 470 , Bragg, William L ., 47 481 , 528 Br~ m~ ell ~_Sit: Frederick , 235 , 236 Carty , John J., 175 , 276 Branly coherer , 324 , 327 , mirror , 59 , 282 , 283 , John , 53 , 131 , 140 , 141 , 469 telescope , 59 , 434 , 449 , 454 British Standards Institution , 83 Cater and Eaton , 356 British Thomson Houston Co ., 10 Cathode , ray , 81 Broadcasting stations , sets, 146 rotating, 368 Brockett , Paul , 318 side, 367-369 Brockie , James , 522 two-cup, 367 , H . P ., 69 , 70 Causticsoda , 424

554 INDEX . ) \ s < ' "Coma.. . 444 I . ~ N 0 00 , ~ ) : . . : ) , I ' - : ' , :

. Commission. United StatesElectrical , ; ~ I ~ 5 ~ " : ~ N - N N : W I . ? ~ ~ . ' - ) - s " ) " " : cn 493 , 496 ~ o = O I ( cr ~ [ g 8 = ~ . " ~ , . . . . . ) ) \ - 1 < . . ' ' . . .

g Commutator , 87 : ~ = I _ 0 ~ . I . t [ O ) ~ : ~ ' . J . " . . ' . - : \ ) . . " cn . ; . . " Compensated field arrangements in lot 0 Iot . ~ S g . ~ 9 - ~ ~ @ s . i ' ~ - nnnnn 0 , ~ ~ J J I - . : . 0 \ . - . . generators , 428 ; ~ N ~ ~ ~ ~ ~ . ~ ~ ~ ~ N ~ OON - \ 00 O - ~ ~ . ~ ~ ~ . ' . s ) 1 : : ' , Arthur , 344 ~ g ~ ~ 1 = g I ~ 0 gq . : : - . . : I . ) 1j ) : > 9 : . " " ' :

JQ " Comte , August , 483 ~ ~ g g : . ~ ( ~ 0 . 0 ~ I I Q ~ e - nn VJ ~ ( ~ ~ J

O Condensers , charging in multiple , 370 - ~ \ N N ~ w 0 ~ ~ o - ~ ~ 1 , ' " I . J ; ) . \ = - " . for high voltage , 87 ( - lot ~ g g S ~ ' S ~ ~ N 00 n 0 - ~ ~ ~ ~ . : ' , " } Conference of Engineering , Tokyo , ' ~ 0 ~ . 0 W ~ - ~ . . . ) : 0 0

. 404 < ' : . se I g : . ~ \ \ ' ~ s =

: Constant current , machine ~ S ~ = ~ n w 0 ~ ~ , . . ] . . . : , t . . : -

: . .

. electromagnet for , 519 , 523 ~ ~ ~ t - ~ . ~ ~ . N ~ : ~ . - ~ . : . " . ) 1 ? s ) s I ? " : : ' : : regulator , 425 ~ 100 0 0 ( ; N ~ s c ~ = I = : . ~ ~ - < - n ~ . . ) ' " . ' " transformer , 426 , 520 " - ~ ~ Olot 0 - ~ ~ 6 ' ~ ~ - ~ ~ ~ ~ ~ E < ~ ~ ~ . ) } " " ' Constellation , Hercules , 438 , 443 , 453 " ' ' ~ ~ ~ - ~ < ~ ~ ~ ~ ~ ~ 9 P ~ ~ ' - ; s 3 " " I : : Orion , 303 , 304 : " S 0 " = ' - ~ 0 ' ' . ) . . J ' " . . . s ; . s0 ) ! - " = D : : . . : " ;

. Trianguli . 44 3 t9 JQ = 0 ~ ' : . ( ~ ~ = ( 0 ~ ; S 1 - 0 ~ < ( ~ ) ) , ) ) ' J . . . . + ; s OSNt , - - - : - ' " - : , . . . . (

JQ - Control , of telescope movement 0 = 0 0 I 1 I nn ~ ' n " " - 00 Ws \ 1 w I ~ J ( ~ ~ ~ . . - ) \

' ( electric ) , 530 . O ~ 5 ~ I Q ~ ~ N - 0 ~ ...... " s I . i1 . : : . < systems , railroad , 427 , 428 , ' fJ " " ~ . = : ~ t ~ ~ ~ : ~ ~ " J r . " : . Converse , 208 " i 0 S ~ S - - - ~ . . . . 1 ) ) . - : . . ) S ) s - - : - - . " : ' :

; . . Cooke , Conrad , 504 , 505 , 508 S ( 5 = I = tT1 ~ 0 = 0 = . nnn ~ " I I ~ ~ ~ ~ ~ . ) J . J ' . . - : " ~ .

. Cooker , anthracite , 190 , 191 - " ' ~ 0 - N - ~ I : J ~ . ) "

" g Coolidge , William D ., 78 , 175 , 535 , - " ~ ~ S ( g 0 ~ _ 0 ~ N - ~ ~ . ~ . . ; . : . : : ) ) ) . : : " : " '

. 538 , 548 ~ . ~ 0 1 ( ( : ~ ~ ~ . . . ' J J ' . . t . . . . ) ; ) s : ; ' " = . . " : ' : . l . r

. X -ray tube , 78 ~ " a al . ( s : < I . o = ~ . " ' - - - w ~ ~ ...... : - ) s s . s . - - . ' ' = , " < it : : . : . . Coon Butte , 45 , - 0 ~ 0 = g = = e ' " ~ C " s v . l = . " ~ - ~ . . J : . . . ) : ) ' . = " < . : "

. Copernicus , lunar crater , 38 , 41 , 42 , 0 ~ ~ ~ 0 ~ ~ - " ~ , - C 1 s " ( ~ & n ~ - ~ - ~ ~ . ' - : - :

. 253 ; < - ~ > - S ~ . - - 0 " ~ ~ ~ ) J 8 J ' . - 0 0 0 \ 0 - : : ) \ - . .

- Cordite , 236 - - ~ 00 I - ~ ' 0 W \ 0 \ ' nnnnnnn - \ \ J ~ ~ . J ~ ~ r ~

\ Core, rotating, 521 - w , . " . + 1 ) s ; . . - : " : : . Corn, preservationof flavor and sugar, I , 0 ~ ; 0 ~ S ~ g - g ~ ( 00 = 0 : - 0 . ~ ~ ~ n ~ ~ 153, 154 ~ w 0 ' . - : : " .

; Corona, 39, 145 Ej c . - 8 n " " 0 n ~ ~ - : - : < ; Correspondenceof Naval Consulting p ~ g ' ~ , I : + : O I " - - : Board with Professor Elihu I ~ ~ ~ ; - ~ 0 : lot ~ " ~ \ ~ ~ ~ . ; J : . " \ ~ : . Thomson, 388 N ~ , oo : c ~ = - - ~ 0 ~ ~ ~ ~ . . ' ' . s ) , , . 0 : " , . Cosmic, dust, 38, 42, 46 ~ ( " ~ cr ~ . 0 ~ = ( ~ ~ W " ~ ~ ' + . ) ; " - ' 9

: rays, 387 g " ~ ~ ~ ~ - . ~ N 00 0 , ~ ~ ) , J . . . . . - - ) " ! . . . Counterelectromotive force . 235 . ~ ~ N I ~ oooo 3 5 ~ t 0 " . - nnnnn nl > . v ~ ~ . ~ ~ ~ ~

Cowper - Coles , Sherard , 508 ~ N - ) ) J . . . - - i1 < .

. Cramer " Crown " plate , 443 < . ' 1ot ~ lot ~ N ~ I N g ~ I - ' ~ ~ ~ ' . . . . F . .

. Crater , impact , 41 . . ~ Iot oo S . ~ a N - nn . ~ ~ : s

: lunar , 38 , 42 , 45 JQ - 2 e = 00 00 ( ~ .

\ Cream - separator , centrifugal , 340 , 428 < ~ Iot ~ ~ ~ N 0 ~ ) ) J . . ' - - : = . Crocker , 57 . . - ~ N s 2 3 ~ 0 lot - oo I ~ 00 ~ W ~ J ~ . ' . . : ' s ' sO ) . : :

' Crompton , Colonel Rookes , E . , 48 , 49 , - . - = e = . * ~ ~ 0 I 00 001 , ' ~ OQ ~ J " 0 . ) 50 , 82 , 201 ; . ~ i NO ~ ~ N ~ \ - ~ ~ . : )

' ; and Company , 82 " a e ( " ' ~ 0 ~ ~ ] , ' . s . + " ) - = 0 . " -

: tube , 364 , 514 - ' - S = 0 I " ~ s ~ 0 ' ' 0 I ~ " ~ . ' oo ~ ~ ~ nn ~ ~ ~ . \ Cross , 461 N ~ O . . . 1 ' s s ) > " " Crown glass , barium , 511 : : : " JQ 0 ; 0 " = ~ S " ~ = ~ 8 0 0 Iot ( ~ II n ( ~ ~ ~

. " C - tube " detector , 388 ~ ~ , g ~ ~ g - ~ - - ~ ~ . . ' ' g )

. , steam turbine , 64 " ' < . ' 0 I ~ - 0 0 Iot : . W ~ n ' ~ ~ - ~ ~

555 INDEX

Curved photographic plates, 448-450 homopolar , 87 , 90 Curved space, 187 electric machines , half -century Cut-outs, 425 celebration of , 170 , 175 , 176 fllm , 425 static machine for x -ray tube , 357 Cutter , George, 194-196 unipolar , 87 Cutting tool , 132, 141, 182 Dynamo - Electric Machinery , 518 Dynamometer , chronograph , 61 Daily Gleaner, 346 transmission and absorption , 5 , Sir Henry H., 342 Darrow. Clarence. 154 Ear , tophus in , 403 , 412 Davis, Manual of Magnetism, 14 Eastman , George , 133 Dayton, Tenn., 152 Eclipse , 56 -57 , 58 , 60 , 61 , 168 Decentraliza tion of industry , 82-83 expedition to Russia , 531 Dedham circuit , 73, 74 of Zeta in Auriga , 344 Delegatesto International Electrical solar , 168 , 169 Congress, 332 solar , weather probabilities during , De Magnete, Magneticisque 533 , 534 Corporibus, 524 , Sir Arthur S., 491 Dercum, Francis X., 218, 408, 409 Edgar , C. L ., 152 , 155 Deutzalcohol engine, 97 , A Boy 's Life of, 356 Devitrification , 120, 122 Edison , Decorative and Miniature . Sir James. 232. 235-237, 521 Lamp Department (General Diablo Canyon, 31, 37 Electric Company ) , 358 Diamonds. at Meteor Crater. 26. 29. 30 dynamo , 12 sorting by adhesion, 109 Electric Illuminating Company , 356 Dianol, 315, 316 Company , 64 , 147 , Diatoms, 312 225 , 328 , 420 Dictionary of Applied Physics, 148 His Life and Inventions , 354 , 356 Dialectric strength, 237 Hopkinson dynamo , 195 Diesel cycle, 92 Illuminating Company of Boston , Diffraction grating, 53, 259, 442 152 , 155 Dina Optical Laboratory , 476 lamp , 195 Direct photography, wIth double slide medal , 175 , 420 plate carrier, 445 method for measuring current Disc armature, 10 (amperage ) , 8 Distortion of astronomical mirror by storage battery , 226 , 228 , 229 changesin temperature, 529, 530 Thomas A ., 70 , 149 , 160 , 183 , 224 , Distribution , three wire system, dc, 245 , 318 - 320 , 322 , 328 , 331 , 347 , 173 350 , 432 , 510 Divided arc, 203, 204 Educational Observatory , 451 Double slide plate holder, 434, 445 Eglin , William C. L ., 175 , 497 Drawing fine wire, jewels for , 537 Eickemeyer , Rudolph , 431 Drilling at Meteor Crater, 45 , Albert , 135 , 166 , 271 , 272 , Drop of Potential at Carbons of 379 , 383 , 384 Electric Arc , 17 Einsteinism , 273 , 334 Dunham, Theodore, 290, 291 Electric , air drill , 427 Dunlop, John B., 131 arc , mechanism of , 18 Dunn, Gano, 284, 285 arc welds , 153 , 161 - 163 Dust, cosmic, 38, 42, 46 automobile , 113 , 421 pollution , control of, 95, 96 circuit indicator , 88 Dynamicables, 151 furnace resistance , 429 Dynamo, 424429 heater , 163 acyclic, 87 . lamps , miniature , 356 Btirgan. 87 lighting , 112 Edison, 12 railways , trolley . 112 .- Edison-Hopkinson, 195 refrigerator , 135 , 156 , 169 - 170

556 INDEX

Electric, (continued) Deutzalcohol, 97 SupplyCompany . 7 gas, 92 trucks. 178 oil, 98 VehicleCompany . 75 reciprocating, 90 washingmachine . 156 Winans. 82 welding , 135 , 426 wobbler-crank, 90 welding of Russian bell , 532 Ether, 85 Electric Arc Lighting , 201 , 522 Ether drift, 166-167, 383 Electric Arc , The , 17 Ethericforce . 149. 224. 318. 320 Electrical , Conference ( Europe, war cloudsover , 215 Institute , ( 1884 ) , 497 EvershedOhmmeter , 9 Congress , 19 , Sydney, 125, 126, 129, 504 Engineers Institution of , 83 Evolution, 154, 187 Exhibition , Philadelphia , 1884 , 102 Ewing, Sir JamesA ., 125 Electrical Engineer , 346 , 359 , 370 Exhibition, InternationalInventions , Electrical Papers ( ) , 160 194 Electrical Phenomena (Thomson ) , 150 , Expandinguniverse , 491 326 Expansionmethod ( for liquefyingair ), Electrical Progress and Its Unsolved 22 Problems , 504 Experiments, jointly with Thomson, Electrical Resistance , Approaching 241 Absolute Zero , 237 Explosion, steam, 29, 31-33 Electrical World , 237 , 324 , 346 , 359 Exposition, Cincinnati, 374, 375 Electricity and Animation , 547 Exposition, International, 1881, 82 Electro -asepsis, O'Neil , 248 , 250 Eyeglasses, fusedquartz , 391 Electrocution , 69 , 70 Electrodes , carbon , 200 , 201 , 206 , 210 Director , Boston Art Forest City , 200 . 376 . i

Fall of' a Meteorite (Thomson ) , 37 ( Hardtmuth , 201 Tj ~ a b ' t " sheathed , 164 - 165 , Centenary , 48 , 49 , 50 , 184 ~ ~ ~ S ~ Electrolyser , to produce hydrogen Medal , 51 , 52 , 86 , 159 , 160 from water , (Siemens Brothers ) , Michael , 184 , 185 , 224 423 , 424 Farwell , Justice , 15 , 16 Electromagnet for constant current Father of Electrical Science , 524 machine , 518 , 519 , 523 " Father of Protective " grounding , 70 Electromagnetic induction , 318 , 319 Fauces , 411 repulsion , 233 -235 , 240 Fear for future , 548 waves , 318 , 319 Ferranti , Sebastian Z ., 160 , 161 Electromagnetic regulator , 518 Ferro alloys , 244 , 245 Electromotive force , counter , 235 Figure (defined ) , 136 Electron , 387 Filament , carbon , 183 magnetic whirls , 81 platinum -iridium , 183 Electrostatic Voltmeter , 9 , 12 Film cut -out , 425 Electroteclmical , Commission , 100 - 102 Finsbury Technical College , 5 Commission International , 83 Fire -control instruments , for artillery , Elements of Physical Manipulation , 469 396 " First electrical machinery tests of all Ellis , A ., 286 , 288 , 290 - 295 , 298 , 336 , time " ( Franklin Institute , 1877 ) , 489 172 , 375 Ellis , Mrs . A ., 41 First Principles of Physics or -Natural. - ---. - Energy , wireless transmission of , 113 , Philosophy (Silliman ) , 14 115 , 143 Fish . Frederick P.. 12 . 69 . 76 . 360 , Engineering (journal ) , 194 , 195 414, 431 Engine , alcohol , 97 Fish, WalterC ., 75, 76, 421, 422 automobile patent for , 84 Fitz-Clarktelescope , 55 cooling , 99 ' "Fixed, vertical, Universaltelescope "

557 INDEX

(RitcheY)t 468 Gardenstvegetablet in wart 114t 125 Flamestluminoust 94t 96t 97 GarretttG . S.t 67 nonluminoust94t 97 Gasestfree expansionoft 387 FlammariontMadame Camillet 505 Geisslertubet 513t 514 Flashboilert 97-99 GeneralElectric CompanYt 64t 72t 74t FlemingtJohn A .t 183t 184t 231t 239 75t 134t 135t 225t 292t 295t 328t Flight of a Meteor( Thomson)t 46 414t 426t 477t 503t 504t 535 Flotation on mercury( telescopes)t 441 GeneralElectric Review , 323 Floatingmatter collected by celestial Hawkinsarticle int 546 bodiest145 Generatortautomatic adjustmentt 518 Fluid pressureenginet 421 Grammet82 Fluoridescreent 366 homopolart87 Flux for arc weldingt162t 164 ThomsonHoustont 424 -429t519t Flying machinet347 -349 523 " Followingt" astronomicallYt530t 531 GeologicalSurveYt United Statest Foott tophusint 403t 412 31-33 FootetA . E.t 31t 36 "Ghost" mattert 307 ForbestGeorge , 204 Gilbert, GroveK ., 31-33, 36 Forcetapolict 149 GilberttWilliamt 517 t 524 etherict149 GiventR . D.t 167 Fordt HenrYt441 Glasstcrown Bariumt511 ForestCity carbonst200 leadtbulbst 363 ForresttJamest lecturest 85 -88t 503t opticalt59t 62t 134t470 504 polishingt148 Foucaulttcurrentst 13 GlassGiant of Palomar, 434 experimentt12 GlazebrooktSir RichardT .t 148 FrankfordArsenalt 470 Glow lampt 7t 10 Franklin Institutet 241t 249t479t 493t GoldsmithtAlfred N.t 296 497t 501t 510 Goutt 403-411t 545 Journaloft 320-322 Llewellynont 410 testst424 GracetSergius P .t 318 FredericksburgtVa .t 306 GrahamtThomast 542 Freeexpansion of gasest387 Grammetgeneratort 82 Frequenciesthight 149 ringt 209 Frick EducationalFoundationt 55 GrandCanyont 31 Frickt HenryC .t 53t 54t 55 Graphitefurnacet 435 Fritz medalt175t 176 Gratingtruled platinumplated , 529 Furnaceelectrict resistancet 429 Gravitationalattractiont velocity of Furnacetgraphitet 435 propagationoft 273 FurtherNotes on MeteorCrater Gravitometert26 (Barringer)t 39 GraYtElishat 378 FusedSilica in the ElectricalIndustry Greeksand Trojanst 306 (Thomson)t 181 GreenetDanat 21 Fusedquartzt 92t 93t 135t 181t 226t GreenetWilliam H.t 241 227t 255-259t 265t 267t 268t Groundingtfor safetyt 426 273-298t 423t 424t 429t 474t 484t safetyelectricalt 501 490t 514t 515t 529t 534 of secondaryt 173 disct 153t442 Guidingtwirelesst 135 eyeglassest391 Gulchersystem of arc lightingt 195t for mirrorst255 -259t 265t 267t 268t 199 273-298 for shearst423 HaletGeorge E .t 180t 251t 441t 459t speculumoft 153 468t 473-475t 534 Fuseloilt 220t402t 406t 407t 411 Halley's Cornett309t 453 Handbuchder Angewandte Optik , 300t Galli-Curci, Amelita, 354, 355 302

558 INDEX

Hardtmuth carbons , 201 Hussey, of the Lick Observatory, 261 Harmful Preventable Noise , Its Cost , Hydro-electric stations, 177 502 Hydrogen by electrolysis of water , Hartmann test , 57 , 58 423, 424 Harvard , Astronomical Station in Hysteresis, 86, 88 Jamaica , 399 School of Applied Science , 415 , 416 Ice , made in Thomson home , 156 Haskins , Caryl D ., 22 Illuminating Engineering Society , 329 Hawkins , L . A ., in General Electric Impact , crater , 41 Review , 547 parasitic , 38 Hayes , 24 theory , 31, 33 , 34 Heater , lamp , 190 Incandescent , lamp , 422 patented , 161 , 163 high voltage , 172 Heating , central , 190 Induction , balance (Hughes ) , 501 Heat resistant steel alloys , 165 electromagnetic , 318 , 319 Heaviside , Oliver , 160 , 328 high frequency , 336 Helicopter , 509 Induction of Electric Currents , 236 Helium , 542 Inductorium . 367 in respiration , 541 , 543 Industry , government regulation of , Helium in Deep Sea Diving , 543 344 Hemispherical test , 200 , 201 Infinite universe , 187 Henry , Joseph , 149 , 150 , 224 , 318 , Influenza , 101 , 103 319 Institute , Carnegie . See also , Carnegie Hercules , cluster in constellation , 57 , Institute 59 , 438 , 443 City and Guilds of London for Hertz , Heinrich , 319 , 324 history of science and civilization , Heusler alloy , composition of , 246 482 Hewitt , George W., 299 Franklin . See Franklin Institute High frequency , experiments on of Radio Engineers , 329 animals , 428 of Technology , Massachusetts . See induction , 336 Massachusetts Institute of papers by Thomson , listed , 337 Technology transformer , ironless , 427 Institution , British Standards , 83 wave , guided by ocean water , 143 Carnegie , 257 -262 , 264 , 266 , 470 , High -tension transmission , 173 , 177 481 , 528 Hilgard , Julius E., 496 , 497 of Electrical Engineers , 48 , 83 , 159 , Hissing of the Electric Arc , 17 169 , and Smithsonian , 270 Telephony , 204 Insulators , 87 Hobart , H . M ., 158 Insulin , 342 Hoedi (the kids ) , 344 Insull , Samuel , 146 - 147 Holsinger , 28 , 31-33 Instrument laboratory at Mt . Wilson Holtz machine , 364 - 366 Observatory , 436 Homopolar dynamo , 87 , 90 Interference test , 515 Hooker , John D ., 441 Interferometer telescope , 274 , 275 Horned toad , 544 International , Astronomical Union , Horse -drawn vehicles , 112 252 Horseless carriage (electric Electrical Congress , 102 , 265 , automobile ) , 74-76 , 421 328 - 331 , 332 Houston , Edwin J ., 64 , 65 , 66 , 67 , 68 , Electrotechnical Commission , 83 , 149 , 176 , 320 - 323 , 328 , 496 100 , 102 , 104 , 105 , 124 , 127 , 129 , Hughes , David E ., 203 , 204 , 205 , 1$ 1, 175 , 329 50G - 505 . Exposition , 1881 , 82 Hughes , Arthur , 344 Inventions Exhibition , 194 Hunt for a Great Meteor and Its Lesson relations , 392 , 393 (Thomson ) , 37 Interrupter , coil , 21

559 INDEX

Interrupter ~ coil ( continued ) JuvisyObservatory , 506

Wehnelt , 370

Introduction to the History of Kant , Immanuel , 482

Science , 481 Keller , Harry F ., 241 , 248 , 250

" Invar ~" 450 Kelvin , Lord , 5 , 21 , 82 , 100 , 101 , 102 ,

Inventions , Researches and Writings of 103

Nikola Tesla , 354 medal , 391

Inventor of the Valve , 240 Kennelly , Arthur E., 102 , 103 , 126 ,

Inventors ~ recognition ~ humility ~ 184 160 , 328 , 526

Iodine ~ 410 ~ 411 " Kennelly -Heaviside layer ," 160 , 328

Iodocincophen ~ 410 ~ 411 , 228

Ionized particles ~ from solar activity ~ Knott . L . E., Company of Boston , 361 140 Kohlrausch ampere -meter , 11

Ionosphere ~ 160 Krakatoa , 29 , 42 Iridium at Meteor Crater ~ 26 - 27 Krupp (steel works ) , 181

target- -. 370

Iron . arc . smoke in rotating field . 138 . Laing , Wharton , and Down , 194 139 Lamme , Benjamin G ., 377 at Meteor Crater , 45 Lamp , Edison , 195

ore , magnetic concentration of , 40 heaters , 190

passivity , 344 incandescent , 422

shale , 45 incandescent , high voltage , 172

Isis , 481 , 486 Jablochkoff , 195

Isochromatic plate , 435 Jaspar , 208 , 209

Iso - electric point , 342 , 343 mercury arc . 422 . 423

Is the Heaviside Theory Valid ? miniature electric , 356

( Thomson and Lodge ) , 160 Swan . 82 . 195 , 199 tantalum , 88

Jablochkoff candle , 195 Thomson '93 alternating , 522

Jackson , Chevalier , 220 Varley , 196 , 199

Japanese mirror effect , 267 Langley , Samuel P., 60 , 62 , 261 ,

Jaspar lamp , 208 , 209 346 -349

Jazz , 147 Langmuir , Irving , 335 , 342 , 538 , 541

Jeans , Sir James H . , 491 Large Bulb , Lamps as Secondary

Jenkin , Fleeming , 493 Standards of Light , 239

Jet propulsion , 387 Laws of Mines and Mining (Barringer ) ,

Jewels for drawing fine wire , 537 36

Johnson , Alba B . , 318 Lead glass bulb , 363

Johnson and Philips , 522 Lead glass, for X -ray tubes , 364 Joule - Thomson effect , 22 , 23 League of Nations , 130 , 430

Journal , Annals of Harvard College Le Conte , 261 - 263

Observatory , 396 Lectures , by Ritchey , 479 Astronomische Nachrichten . 397 Le Maistre , Charles , 106 , 115 - 121 ,

Daily Gleaner , 346 145 , 157

Electrical Engineer , 346 , 359 , 370 Lemp , Hermann , 421 , 422

Electrical World , 324 , 346 , 359 Lens , rock salt , 60 -61 , 64

Engineering , 194 , 195 , 203 L 'evolution de l 'astrographie et les

Franklin Institute , 320 - 322 grands telescopede l 'avenir, 480

General Electric Review , 323 Lick Observatory , 56 -58 , 463

NewEnglandMagazine , 324 Lick telescope , 439

New York World , 225 , 228 Lieb , John W ., 157 , 174 , 178 , 325 ,

Philadelphia Ledger , 22 354

Philosophical Magazine , 236 Life on the , 400

Popular Astronomy , 400 Light , deflection of , 270

TheMirror , 242 , 323 Light , effect of , in promoting growth

" Jovian Year , " 488 of plants , 546 , 547

560 INDEX

Light Emitted by the terrestrial , 86 , 89 Continuous -Current Arc , 17 Magneto , 124 , 126 Lighting , electric , 112 motive force , 86 Lightning , 91 optics , 86 , 89 arrester , 427 Magneto -Optical Effect , bead , 86 communication on , 89 globular , 86 Magnetometer , 26 Thomson ' s ideas on , 86 , 89 Magnitude of a star , 440 Lilly , Eli , Company , 342 Mahler , Gustave , 316 , 317 Lime light , 199 , 200 Mailloux , C . 0 ., 118 , 127 , 129 Limestone , Laibab , 26 Mallet , 242 , 253 red , 26 Mallinckrodt body recovered from Linde , Carl , 22 , 23 water , 341 Liquid air , 22 , 236 -238 Mallinckrodt , Edward , 339 oxygen from , 423 Manual of Telephony , 207 to produce vacua , 422 -424 Marconi Fund , 355 Liquid Air as an , 237 Marconi , Guglielmo , 149 , 232 , 239 , Lithium silicate , 276 240 , 319 , 324 , 346 , 354 , 355 Little Moose , 340 Mars , map of , 400 Living , cost of , rents and taxes , 146 , opposition of , 533 , 534 157 Martin , Thomas C ., 324 , 325 , 346 , 524 Llewellyn on gout . 410 Mascart , E . E . N ., 100 - 102 Load , curve , 88 Mason , Max , 293 , 294 factor . 88 Massachusetts Institute of Technology , Loading coil , 88 124 . 125 . 133 . 414 . 415 . 510 , 535 telephone , 417 Thomson , acting president of , 124 , Lodge , Sir Oliver , 166 , 168 125 Loeb , Jacques , 540 Mass -measurement , 119 , 121 Long - distance transmission , Mather & Platt Co ., 201 transformer for , 187 Maxwell , James Clerk , 142 , 146 , 148 , Low temperatures , 236 , 237 224 , 232 , 321 , 326 Low -voltage distribution , 151 Maxwellian waves , 318 , 319 , 321 , 323 Lumbago , 545 McDowell , James B ., 58 , 61 Lumiere autochrome plates , 132 McGill University , 20 Lunar and Hawaiian Physical Features McKay , Gordon , 415 Compared , 399 , 400 McManus , John A ., 503 , 514 , 515 Lunar , crater , 253 -255 , 400 McPherson , Dean , Ohio State system of naming , 255 University , 376 marking , 253 Meadowcroft , William H ., 356 Lundin , Carl A . R ., 533 Meares , J . W ., 92 Lynn Gas and Electric Company , 155 Measuring current (amperage ) , 8 Measuring instruments , electrical , 21 Magic mirror , Japanese, 267 Mechanical , Thermal and Optical Magie , William F ., 29 , 30 , 39 Properties of Fused Quartz Magnet , permanent , 126 , 128 , 129 (Thomson ) , 154 , 181 physiological action , 525 Mechanism of the Electric Arc , 18 strength of field with varying loads , Mechanism of Life , 219 202 . Mendenhall , Thomas C ., 372 " Mercurial Year " 488 Magnetic , alloys , 536 , blow -out , 425 , 428 Mercury , arc lamp , 422 , 423 concentration of iron ore , 40 flotation , 439 hysteresis, 89 Mercury , perihelion of , 271 , 272 lines, 86 Meridian photometer , 396 whirls (electron), 81 Messier 13 , 57 Magnetism, 125 Metallic oxides , effect of heat upon Manual of, Davis, 14 color of , 140 - 142

561 INDEX

Meteor Crater , 26 , 36 - 37 over -excitation of , to advance current Exploration and Mining Company , 26 phase, 521 ore , analysis of , 40 polyphase , 426 Meteor Crater , Paper read before repulsion , 426 National Academy of Sciences , 30 variable speed, 88 Meteor Shower of 1867 (Thomson ) , 43 Mt . Palomar Observatory , 251 , 298 Meteorite , 29 Mt . Whitney , 261 , 262 fall of , 106 Mt . Wilson Observatory , 56 , 57 , 131 , Meter , direct current , 87 134 , 180 , 251 , 261 , 276 , 277 , 290 , Metoquinone , 316 298 , 438 -441 , 461 , 464 Metric system , 329 Muffler (silencer ) , 429 Michelson , Albert A ., 510 , 529 Multi -gap arrester , 426 , 427 Michelson interferometer telescope , Multiple arc distribution , transformer , 274 , 275 428 Michelson and Morley experimentt Munro, John, 504, 505 168 , 333 , 379 Museum, National, 486 Michigan University Observatory , 292 Muybridge, Eadweard, 218 Microphone , 501 , 504 MysteriousUniverse , 491 Milky Way , 487 Miller , Dayton C., 166 , 379 NationalAcademy of Sciences, 19, 26, Millikan , Robert A ., 506 , 538 , 539 31, 49, 485 Minerals of Commercial Value Boardof Standards, 330 (Barringer ) , 36 ElectricLight Association, 183, 325, Mining law , 32 351-354 Mirror , built up , (rib and plate ResearchCouncil , 270, 468, 485 cemented ) , 445 , 447 , 452 , 478 , Natureand Origin of VolcanicHeat , 479 255 Cassegrainian , 282 , 283 Naval Consulting Board , U .S., 535 , 540 interchangeable , 479 Navicula rhomboides , 312 magic , Japanese, 267 Nebulae , 435 , 438 -440 Newtonian . 282 . 283 Neocincophen , 406 -410 non distorting , 134 New Background of Science , 491 quartz , 223 Newcomb , Simon , 496 , 497 quartz , 200 -inch , 179 , 223 " New curve " telescope , 444 , 446 , sextant , 59 448 - 460 , 454 , 458 , 459 , 461 . See stellite , 79 also, Telescope , new short type Mitchell , General " ," 513 New England Magazine , 324 Modern Photographic Telescope and New Form of Wehnelt Interrupter , 370 the New Astronomical Newton Bi - Centenary , 166 66 Photography , 448 Newton , Sir Isaac , 59 Molybdenum , 117 , 123 Newtonian -. mirror -. 59 -. 282 -. 283 " Monkey trial ," 154 telescope , 59 , 434 , 449 , 454 , 461 , Monoiodocincophen (Farastan ) , 410 479 Moon , face of , 38 , 45 New York , Academy of Sciences , life on , 400 Thomson invited lecture , 418 temperature of surface , 144 Edison Company , 364 vegetation on , 140 New York World , 225 , 228 Mordey , W. M ., 504 , 508 , 509 Nice Observatory , 446 Morgan , Charles L ., 390 Nichols , Ernest F ., 146 Morgan , J. P., 72 Nickel at Meteor Crater , 29 , 41 , 43 Morton , Hemy , 362 Nitric acid , 388 Moscow , 210 Nitroglycerin , 46 Mosquito eradication , 433 Node , 381 , 382 Motor , motors and motoring , 501 Noise Age and Nervous Torture , 502 motorcycles , 159 Noise , preventable , 499 , 502 induction , 426 Norma ,n Bridge Laboratory , 387

562 INDEX

Norris , Isaac , 326 Passivity of iron , 344 Notes on the Moon ( Thomson ) , 141 Patents , exchange , 71-72 Nova , 434 , 463 , 464 licensing , 72

Novel Magneto - Optical Effect , 138 , pooling , 71 139 Pathe News , 296

Novel Phenomena of Alternating Payments , balance of , 393 , 394 Currents , 235 Pease , Francis G ., 284 , 285 , 463

Noyes , Arthur A . , 293 , 294 Penetrometer , 107 , 108 Perihelion of Mercury , 271 , 272

Observatory , Juvisy , 506 Periscope , 469

Lick , 463 Permanent Magnets in Theory and

Michigan , University of , 292 Practice (Evershed ) , 126

Mt . Palomar , 251 , 298 Perry , John , 5, 7, 16, 90 , 91

Mt . Wilson , 56 , 57 , 131 , 134 , 180 , Petroleum carbon , 109

251 , 261 , 276 , 277 , 290 , 298 Phenomena of Induction , 326

Philadelphia , 323 , 493 Philadelphia Ledger , 22

Pittsburgh , University of , 53 Philadelphia Observatory , 323 , 493 Ohm , 177 Philosophical Magazine , 236

Ohmmeter and magneto generator , 12 , Phoebe , satellite of Saturn , 399

13 . See , Testing sets Phonodeik , 383 , 384

Evershed , 9 , 475 Oil immersed transformer , 428 Phosphorescence , 521

Oil switch , 425 Phosphorescence at Low Omnibus , 95 , 97 Temperatures , 522

O ' Neil electro - asepsis , 248 , 250 Photographs , spectrum . 60 Optical , glass , 59 , 62 , 134 , 389 Photographic plates of great speed and

American , 511 , 512 fine grain . 442 . 443

polishing , 148 Photography , astronomical , 438 -443 , Optical Systems for U . S . Army , 471 450 - 464 , 476 , 479

Optics , magneto , 86 , 89 color , 135

Organ , pipe , 312 , 314 , 381 - 386 Photometer , dispersion , 5

Origin , Rise and Progress in the Science meridian , 396

of Geometry and Mathematics , 501 Physical Diagnosis of the Diseasesof

Orion , constellation of , 303 , 304 the Chest . 402

Oscillations , 149 , 239 Physicians , Thomson 's attitude toward ,

Osiris , 481 402

Osler , William , 77 Physiological effect of magnetic field ,

Outdoor advertising signs , 147 , 152 525

Over - excited synchronous motor , to Pi . 152

advance current phase , 521 Pic du Midi Observatory , 480 Overhead wires , in Chicago , 216 Pickering , article on moon , 141

Oxides , metallic , effect of heat upon Edward C ., 140 , 396

color of , 140 - 142 William H ., 140 , 399

Oxygen from liquid air , 423 Pioneer Investigations on Dynamo Machines Fifty Years Ago

Painter , 342 ( Thomson ) , 80

Panama , 24 Pipe -organ , 135 , 312 , 314 PanoramIc sIghts . 60 Pipe , welding of , 162

Parabolizing , 435 , 459 , 460 Piperazine Midi , 407 -409

Paraffin gasoline engine , 98 , 99 Pitch , 16

Parasitic impacts , 38 in road building , 107 -110

Paris Exposition , 1881 , 19 Pittsburgh , Plate Glass Works , 59

Paris Observatory , 476 University of , Observatory , 53

Parkhurst , 438 Planets , atmosphere , 145

Parsons , Sir Charles , 160 , 284 , 285 , origin , 38 , 45

503 , 507 . Plant growth (light , chemical ) , 546

563 INDEX

Plaskett , J . S ., 57 , 58 , 59 , 60 Quartz work by Ritchey , 435 , 436 Plate , carrier , 443 curved , 448 - 450 Radio , 224 ; See also , Wireless ; holder , double -slide , 434 ronateur observer , 142 isochromatic , 435 Corporation of America , 296 Platinum , 41 Engineers , Institute of , 329 at Meteor Crater , 26 , 29 preventive of demoralization , 147 iridium filament , 183 telephone , 143 , 146 iron alloy , 245 broadcasts , 143 , 146 metals , 40 , 41 waves , 498 seals , substitute for , 87 , 89 Radioactive bodies , 20 Platt Company , 201 Radiation , pressure , 333 Pleurosigma angulatum , 312 , 313 , 314 solar , 140 " Plumbago ," 546 Railroads , electric , 112 Plu to , 205 Railway control system , 427 , 428 Pneumatic tire , 129 , 131 Ray , cathode , 81 Pogson ' s scale, 438 -441 cosmic , 387 Pole , shaded , motor , 426 Rayleigh, Lord (John W. Strutt ), 380 Polishing , optical , 148 Ray ton lens , 298 Pollution , dust , control of , 95 , 96 Reactive coil , 426 Porter , Russell , 284 , 285 Rectifiers , 87 Possible Means of Cutting Down the Red Beds at Meteor Crater , 29 , 37 , 45 Mosquito Population , 433 Refrigerators , electric , 135 , 156 , Possibilities of Liquid Air in Electrical 169 - 170 Work , 237 Regulators , alternating current , 427 Potassium hydroxide , 361 , 362 , 364 , constant current , 425 367 , 369 of industry by government , 344 Potter , Hollis , 79 Reis , Philipp , 378 Power , distribution , 5 Relativity , 270 , 333 , 491 wireless transmission of , 325 Reorganization of Massachusetts Pratt , Joseph H ., 402 Institute of Technology and Preece , Sir William , 205 , 207 . Harvard , " Provisional Presentation du premier modele de Memorandum " on joint school , telescopeaplanatique , 480 414 - 416 Principles of Electric Wave Telegraphy , Report in Matter of Units of Electrical 239 Measurement , 333 Prism , rock salt , 60 - 61 , 63 Report of Board of Commissioners of roof -angle, 302 Eleventh Cincinnati Industrial Pritchett , Henry S., 413 Exposition , 1883 , 207 Prix Janssen , 476 Report of Committee on Dynamo Producer gas , 93 Electric Machines (Thomson ) , 80 Professor Thomson 's Electro -Magnetic Report on Mars , 400 Induction ExTJeriments . 234 Repulsion , electromagnetic , 233 , 235 , Profiteering , 124 , 125 240 ProTJaf !;ation of Electric Waves , 239 motor , 426 Protons , Thomson ' s thoughts on , 81 Resistance , furnace , electric , 429 Puffer , William L ., 17 for high temperatures , nonoxidizing , Pulsation theory , 487 88 Pupin , Michael I ., 160 , 417 Rheumatism , 186 Pyrex disks , 275 , 284 , 297 Rice , Calvin W ., 137 Pyrogenerator , 244 , 245 Rice , Edwin Wilbur , Jr ., 73 , 76 , 206 , 420 , 535 , 545 Quartz . See Fused quartz Richards , Theodore W ., 330 , 414 , 416 Quartz mirror , 12-inch , 153 Richmond , Va ., 306 200 - inch , 223 Rigel, 303 , 304 large , 255 -257 Rightascension and declination , 54 , 55

564 INDEX

Ring , Gramme , 209 " Scientific Wounds " (Thomson 's X -ray Ring Nebula in Lyra , 298 burns ) , 371 Ring Theater ( file in ) , 82 Scientists , (names of ) , endorsing Ritchey - Chretien telescope , 479 , 480 Sarton ' s Institute for History of Ritchey , George W., 131 , 253 , Science , 484 266 -269 , 284 , 310 , 311 , 434 Scopes, John T ., 154 Ritchey (George W.) and Development Screw threads , 136 of Celestial Photography , 446 Gauge Committee , 121 Road building , 95 , 98 , 106 , 107 , standardizing , 114 108 -109 , 111 Standards Committee , United States , Roberts , Lord , 15 117 Rock salt prisms and lenses, 60 -61 , 63 Standards International , 117 Rockefeller , Foundation , 251 , 284 , Seal, platinum , substitute for , 87 , 89 290 Semenza , Guido , 151 , 154 grant of six million dollars , 284 , 290 Separator (ore) , 40 Institute . 540 Sextant mirrors , 59 Roentgen , photography , stereoscopic , 7 Shaded pole motor , 426 papers by Thomson , listed , 371 Shale , ball , 28 , 35 ray burns , 247 ball iron , 35 , 40 Society , 523 Shapley , Harlow , 463 , 487 Roentgenology paper on early days of Shears , quartz , 423 (Thomson ) , 51 Sheathed electrodes , 164 - 165 Roentgen Rays Act Strongly on the Shielded arc welding , 162 , 165 Tissues, 247 Ship propulsion , turbo -electric , 429 Rogers , William A ., 496 , 497 Shock resistant steel alloys , 165 Rohrer , A . L ., 213 Shunt box , universal , 5 Roof -angle prisms , 302 , 469 -473 Side -arms in X -ray tubes , 367 - 369 Roosevelt ~Hoover election , 393 Siemens Company , 210 , 212 Roots , James, 90 Sights , panoramic , 60 Rotating , cathode , 368 Silencer , Maxim , 429 core , 521 Silica Glass or Fused Quartz Rowland , Henry A ., 53 , 290 , 496 , 497 ( Thomson ) , 228 Royal Institution of Great Britain , 20 , Silicides , 246 48 , 49 , 235 , 236 Silliman , Benjamin , 19 Royal Society , 233 , 236 Silliman 's Physics , 14 Ruhmkorff coil , 318 , 322 , 358 Sky , , 145 Ruled grating , platinum plated , 529 Slag in welding , 164 Russell , Henry N ., 35 , 36 Sleeping sickness, 547 Russian customs , 213 -214 Slip -ring , 87 , 88 , 523 Rust resistant steel alloys , 165 Smith , Michael Holroyd , 508 , 509 Rutherford , Sir Ernest , 388 Smithsonian Institution , 270 Report , 1913 , 325 Safety electrical grounding , 501 Smoke of iron arc, rotating field in , St . Gobain Glass Works , 445 , 476 138 , 139 Sampson , R . A ., 458 -461 Smuts , Sir Jan Christiaan , 190 , 191 Sandstone , Coconino , 26 Snow , Helen , 441 Santos -Dumont , A ., 349 telescope , 440 Sarton , George A ., 481 Snyder , Monroe B ., 149 , 150 , 321 , plan for history of science , 482 323 , 326 , 493 Satellites , origin of , 36 Sodium urate , 186 , 403 , 407 - 409 , 411 , School of Applied Science at Harvard , 412 , 545 415 , 416 Sodium vapor lamp , 546 Schwarzschild , Karl , 448 -450 , 479 Solar , constant , 145 ,~cience and the Unseen World . 491 eclipse , 1914 , 532 Science , history of , 482 Norway , 1927 , 168 " Scientific and Literary Society ," 241 radiation , 140

565 STJarks Stars Sound Spectrograph Starr Spiritualism Spherometer Speculum Spectrum Spectroheliograph Spark Space Sound Stanley Sprague Spooner Spherical Spectrometer Story Steam Static Star Standards Standard Square Spraying Street Steinmetz Steel Stations Sprengel Stokowski S Stern Stereoscopic Stereoscope Steinheil Stellite Striae Street Storage Institution of loss high explosion tempering turbine mirror tockly X - Ray Control 431 fused 7 Operation 44 cluster , , , and - of , Thomas , and hardening speed - ignition of , machine 429 , Railways 7 congestion waves curved Waves , 516 holes , car Lightning , , . , , , batteries , , composition temper , , William , Electricity 432 450 George 79 79 General pump generating melted Atoms Henry Iron armature Samuel , , 64 quartz Adolph photographs , Sprengel , , , 267 Association Charles , , , 509 , Leopold in , , . 29 , , , 428 , ~ , 121 , 366 . British 123 241 79 , , 87 objective photograph Roentgen , 114 , Shape 305 454 535 Company Hercules lenses and , , 187 , 88 for 314 , with 530 31 , , , , 183 J , , of - quartz , Their , Electric . , 99 W 171 , 491 361 128 153 122 , , 75 . , - Cosmic , Maintenance automobiles , 300 X 306 P 470 33 499 251 , pump . , , 207 , 121 , , - and , . 174 and age 171 83 ray , of 184 316 137 , 173 , 370 , , 42 Construction , , . , American 60 f , photography , 438 496 , 516 , / 79 Speed tubes prisms , , , 122 32 Train 0 120 , 351 of Rays , 185 138 185 . 174 422 36 , , ~ . 33 443 , 497 380 - , , , 354 122 , , , - , 298 445 , 357 424 152 379 379 217 278 ~ , , 385 510 118 , , , INDEX , 566 ~ ~~ ~~~~~~~~~ 00 0000000000 00000000 00000000 00 CDON 00: ::S 000\ I-' Z :::SI~S: ;'~O -O. :o:-:os' 0::I" ~ ~(') .CD...-CD .0. .. .0. .. -CD-~ -CD '~<' ~< Io1~' ~O ~:::S :~::S ~ p", ~0 ioS:J:. ~S. ioS:J:, ~ '.;.:.!."ioS :J:. ~ ~ ~ ic-t .t.=..: :~::s :~::S :~::S -~ ~!7 ~ CD0. cr~ ' 't:::;~ ~ ~:0:-I0 .. ~ CD."., f;!:::>I ~1- 1 .g: .- ~.~::.:.S.~ cnCDg ~CDcn :S~:: s' ~S' -~.oJ:Np' 6 -t.oJ ~\0 -~. oJ:~p' ~ . ~ ~ ~CD. ~g ~ CDs ~g. 1~- 1 e ,~to CD~0 ( " ) g~~ GCD'): ; ~ ~ .... ~:::s ~eoS ' ~. ... ~~ ..... crI=j'' ~0 ~'~-t ~;::> ~ .;I >JI.-: 'J ~'- t~ S ~g ,? -.oJ ~~ v ~"" 0~~ :::s x : 0~\ ~'-t t~/I :~:I"~ (CD ') .~:- ~~ ~t/I cn8 " ?,.>.~ ~ .::gI"~s ~g -.oJF \w0CD; "0d. ~CDP : .:g: I"0 (0') S0 0' 00N ~N \~O~\O ,~~~ ~~ ~CDI t/-I' ~ ~~ w~~CD... :::sOO~ ~~ :CD::S ,,<. . 0:::.s ~N I-' 00oo.~to. 00I-' ~~ N ~~ ~CD .;' . JI\-0'~I -' W0I- ' -.oJ .~... O~ '( i! ~,., :~::s~ ~ 0. ~~ ~ 0~\ 0, ~ t~/I cn<; W ~..... Wt/I~... W..- ~(") \0I -' ~ '0.J ~ ~... -.oJ0 \ ~N tNO/I t/I I- ' Wt/I W\0 00 NI-' ~-.oJ CD<; ~ -...oJ.. ~( ") ~. ioS:J:, 00N ~-~.oJ Wt/I~ ~ ~~ \0 ~00 0::I" ~N 0 \~0 00 CD~ 0 -. oJ0:::.s .; cr0' 00 -N.oJ ~t00/I~ t/I 0I-\' ~W I-' -r-. (1-'1)QQ CD ' 0 \ ~w CD 'rIo;;J"." ~-.oJ ~~~ -~.oJ~ N t~ /lt ~/I .~... -t./oJI ~~ ~00 :t:-J4' ~I-' cnO ~\0 1-' 0,\ 00I-' \00

Terminator (defined ) , 253 , 255 Stuart (son) , 355 , 513 Terrestrial magnetism , 86 , 89 universal double focus tube , 358 Tesla , coil , 249 , 427 watthour meter , 8 Nikola , 346 , 352 , 354 , 526 wattmeter , 427 Test , 527 Thomson , J . J ., 160 , 161 , 336 Cincinnati , 207 Thomson , Robert W ., 131 Franklin Institute , 424 Thorkelson , H . J ., 280 hemi -spherical , 200 , 201 Three - coil armature , 207 Testing sets, ohmmeter generator and Three -hundred inch mirror , 277 magneto generator , 12 , 13 Three -phase generator , 67 , 424 -429 Thames River , E .M .F . of , 231 Three wire distributive system , dc , 173 Thaw , William , 53 Through Time and Space, 491 The Electrical Manufacturers , 362 Thunder storm discharges , 86 The Electric Motor and Its Thyratron , 187 Applications , 354 Tidal wave , 42 Thermionic valve , 232 , 239 Tilghman , B. C., 31 , 33 , 34 Thermite . 536 Time , 297 process , 536 Time - limit switch , 429 Thermoelectric Powers of Metals , Third rail , 87 between Boiling Point of Water and Tire , pneumatic , 129 , 131 Liquid Air , 237 " Toad " (horned ) , 544 Thermometer , furnace , 435 Todd , David , 528 The Story of Electricity , 354 Tokyo , World Conference of Thompson , Silvanus P., 93 , 319 , 324 , Engineering , 404 507 , 517 . Tool , cutting , 132 Thomson . Sir William , Lord Kelvin . 5 Tophus , defined , 403 , 409 Thomson . Elihu . and Ball patent . on in ear and foot , 403 , 412 construction of valves . 84 Traffic , consideration of , 174 attitude toward physicians . 402 Transformer , constant current , 426 collected papers of . 526 with grounded secondary , 426 defense of Langley against high -frequency , 427 Santos -Dumont . 349 long -distance transmission , 187 Donald (son) . 512 . 513 low potentials in secondary , high in Electric Company . 245 primary , 426 fear of world developments . 548 multiple arc distribution , 428 Houston arc generator . 425 oil immersed , 428 Houston Company . name of . 245 stations , 236 Houston Electric Company , 64 , 65 , step - down , 426 66 , 68 , 172 , 194 , 225 , 236 , 504 water -cooled , 429 Houston Company , name of , 245 Transmigration , 432 Houston System , 194 Transmission , high tension , 173 , 177 invited . head of Electrical En ~ neering lines , protection of , 88 Department , M .I .T ., 414 wireless , 143 , 149 , 224 , 320 .. 325 to join Whitney , 538 , 539 Transmutation of elements , 86 , 89 to lecture at New York Academy of Trapezium , 303 , 304 Sciences , 418 Triangulum , 443 , 445 laboratory , 134 TripIer , Charles E ., 22 , 238 Malcolm (son) , 512 , 513 Trolley , electric railways , 112 '93 alternating lamp , 522 Trotter , Alexander P ., 521 , 522 prediction of military use of airplane , Trucks , electric , 178 349 Tube , blue , 365 recommends lead shield against Crookes , 364 X rays danger , 364 Geisler , 513 , 514 regrets failure to complete large single focusing , 363 , 366 , 370 mirror , 297 Swinton , 361 sons, 114 , 115 , i 16 vacuum , adjustable , 364

567 INDEX

Tungsten , 124 , 126 , 152 , 173 , 361 , Wattmeter , 427 ; See also Thomson 535 Wave, electromagnetic , 318 , 319 Tunnel for locating iron ( Meteor Maxwellian , 318 , 319 , 321 , 323 Crater ) , 43 , 44 theory , Maxwell , 150 Turbine , steam , 99 trains , continuous , 86 Turner , ( Oxford University ) , 460 Weather probabilities during solar Turtles , 548 eclipse , 533 , 534 Two - cathode X -ray tube , 367 Weber , equivalent of ampere , 176 Tycho (lunar crater ) , 38 , 42 , 253 Wehnelt Electrolytic Interrupter , 370 Typhoid fever , 548 Welding , electric , 135 , 153 , 158 , 161 - 165 , 167 , 426 Uniflow engine , 75 , 421 atomic hydrogen , 163 , 165 Unipolar dynamo , 87 pipe , 162 United States , Bureau of Standards , Russian bell , 532 493 , 510 , 512 , 535 shielded arc , 162 , 165 Electric Lighting Company , 375 ships , 389 Electrical Commission , 493 , 496 Society of America , 158 Geological Survey , 31 - 33 Welsh , William H ., 270 Naval Consulting Board , 535 Westinghouse Company , 69 , 75 , 143 Universal vacuum tube (Thomson ) , Weston Company , 200 358 -363 Wheatstone stereoscope , 79 Universe , expanding , 491 Wheeler , entomologist , 376 infinite , 187 " Whirling table ," 61 Uranium target , 370 Whitish streaks on , . 38 , Urate of Sodium , 186 , 403 , 407 -409 , 42 411 , 412 , 545 Whitney , Willis R ., 535 Why the 200 -Inch Telescope ? Vacuum , adjuster , 366 ( Thomson ) , 181 jacket , 237 Wightman , J. M ., 19 by liquid air , 422 - 424 Wiley , Harvey , 172 tube , adjustable , 364 Willans engine , 82 universal , 358 - 363 Wilson , Woodrow , 130 , 132 Valve , thermionic , 232 , 239 Wireless transmission , 143 , 149 , 224 , Variations in Electrical Resistance of 318 , 320 - 325 , 500 , 501 Bismuth , 237 of energy , 113 , 115 Varley , flexible carbon lamp , 196 , 199 Wires , along roadway , for propelling Viscosity meter . 107 cars , 113 Vodges , Edward W ., 245 fine , 537 " Voicing " of organ pipe , 385 , 386 Wobbler -crank engine , 90 Volt . 177 Work in the First Decade of determination of , 332 Roentgenology (Thomson ) , 51 Volta , Alessandro , 170 World Conference of Engineering , medal , 169 - 170 Tokyo , 404 World " small " 142 Voltage , low , distribution , 151 , , Voltmeter , 8 , 21 Wormley , Theodore G ., 242 , 243 electrostatic , 12 Wurtz , Adolphe , 241 Voltz , merchant , Canyon Diablo , 31 X Ray , 356 , 360 , 361 , 371 , 387 , 417 , Wahl , William H ., 248 , 250 421 , 429 , 535 Wallace -Farmer Co ., 172 X -Ray , burns , 247 War , atrocities , 526 spectrometer , 47 clouds over Europe , 215 stereoscopic picture , 79 , 366 , 429 Ward Motor Electric Co ., 178 Thomson 's warning of danger , 247 , Washing machine , electric , 156 364 Water -cooled transformer , 429 tube , Coolidge , 78

568 INDEX

Yerkes , Charles T . , 251 Yerkes Observatory , 434 , 4 38440

Zeta in Auriga , eclipse of , 344 Zonal test , 57

569