INDEX TO VOLUME 32 Leadingarticles are in bold face type; notes, abstractsand reviewsare in ordinary type. Only mineralsfor which definite data are given are indexed.

Ahrens, L. H. Aaalyses of the mi- -dispersion ratio as a nor constituents of pollucite. . 44 diagnostic. (Winchell, Meek). .21r,336 Alterationstudies. (Ken). .. . 158,202 Birks,L. S...... 685 Aluminocopiapite.(Berry) 483 Bis-biphenylene,structure of; pre- (rc-raydata). . 28 liminary report. (Fenimore).. . . . 6gg Anhydrite and gypsum in Lyon Boehmitelocalities in U. S. (Allen) 195 Mountain magEetite deposit of Bohnstedt-Kupletskaya,E. M.. . . 373 northeastern Adirondacks. Boksputite, re-examination of. (Zimrner) 647 (Heinrich) 365 Antamokite : petzite f calaverite. . 374 Bond, W. L. Stereoscopicdrawings Apoanalcite. (Oftedahl) 200 of crystal structures. 454 Art of GemCutting. (Dake, Pearl) ...... 6g6,6g6 Bookreview...... 104 Boos,M.F...... 196 Axelrod, J. M. with Milton, C. Bottom, V. E. Anomalousthermal Fused wood-ash stones: fair- effect in oscillator- childite, buetschliite and cal- plates. 590 cite, their essential constitu- Brandenberger, E. Riintgenogra- ents... .. - 204.607 phisch-Analytische Chemie. 198 Book review. 103 Bravais symbols, simple transfor- Bacon, C. S., Jr. Applications of the mations of. (Parsons) 206 Niggli-Becke projection for Bruun, B., and Barth, T. F. W., rock analyses. 257 Stability on storageof the high Bannister,F. A...... 254,702 indexliquids of C. D. West. . 92 Bariteat Pilot Knob, Missouri,oc- Buerger, M. J. Cell and symmetry currence of. (Frank, Moyni- ofpyrrhotite...... 4ll han).. . 681 -- Crystal structure of cuban- Barium titanite, lattice c<.rnsrants ite.... 415 of. (de Bretteville, Levin). . . 686 - Relative importance of the Barnes,W. H. . 684 severalfaces of a crystal... 593 Barney,E...... 685 197,686 Barth, T. F. W., with Bruun, B. -- and Washken, E. Meta- Stability of high index liquids morphismofminerals ...... 296 of C. D. West . 92 Buetschliite (3KrCOs.2CaCO3...... 195,371 6HzO).(Milton, Axelrod). . .204,607 Bates, T. F. Investigation of the Burbank, W. S. Memorial of G. F, micaceous minerals in slate. . 625 Loughlin. 173 Berman Memorial Laboratory. . . . 96 Burova,T. A.. . 373 Berry,L. G...... 196,201,493 Berthonite:bournonite (Thomp- Calcite in copper chloride,replace- son).. . 485 ment of. (Garrels). 689 Beryl, *-ray irradiation of...... 35 Calcium orthosilicate, solid phase Beryllium in pegmatites.(Watson) 94 inversionin. (Zerfoss) 676 Beyerite from Colorado, (Heinrich) 660 Calclacite. (Van Tassel) 254 7As 7M INDEX

Carbonate minerals, differential Crystallographic Society of Amer- thermal analysis of. (Cuthbert, ica. . . . . 684 Rowland) .. .111, 198, 591 Crystallography,challenging prob- Carl, H. F. Quantitative mineral lems in. (Harker) 690 analysiswitharecordingr-ray Crystallography, new charts for diffraction spectrometer...... 508 teaching of . (Quirke) - - ...... 2O7 Carobbi, G. a:rd Pieruccini, R. Cubanite, crystal strucfure of. Spectrographic analysis of (Buerger). 415 from Elba with Cuthbert, F. L. and Rowland, R. A. correlation of color and com- Differential thermal analysis position . 121 of some carbonateminerals . 1I 1, 198 Chalcophyllite.(Berry, Steacy). . . 196 Chalcosideriteand turquoise.(Gra- Dake, H. C. and DeMent, J ham, Berry) ...... 20t Handbook of Uranium Miner- Chapman, R. W. Crystallization als. Book Review. 698 phenomena in volcanic ejecta --and Pearl, R' M. The Art of from Kil4us4, Elawaii...... 105,197 Gem Cutting. Book Review. .. 104 Charts for correlation of optical Davis, T. 196 properties witl chemical com- D.D.T. crystallization from the position of rock-forming min- melt, kinetics of. (Gilpin) . . . 689 erals. (Kennedy). .. . . 561 DeBretteville,A' P.. . 686 Childrenite, unit cell by Buerger DeMent, J. and Dake, H. C. precessionmethod. (Barnes).. 684 Handbook of Uranium Min- Chloritoid at Kalgoorlie.(Prider). . 471 erals.Book Review. 698 Chondrodite and norbergiter syn- Development of the Chemical Ele- thesis of, (Rankama). 146 ments. (Efremov) Book Re- Clay minerals, thermal curves of view. '. 699 prepared mixtures. (Grim). . . 493 Diamond-drill core specimens, Clinohumite and associatedminer- method for polishing.(Moyd). 368 als from Dillon, Montana. Diamond, hardness variation and (Lindberg) 203 microstructure.(Slawson). . '. 694 Collette, R. C., with Frondel, C. Differential thermal analysis of and Hurlbut, C. S., Jr. Syn- carbonate minerals (Cuth- thesisoftourmaline...... 680 bert,Rowland)..'.' .111'198' 591 Contact metamorphic minerals in Differential thermal analysis of melting of optical glass.(Par- Siderite. (Paul F. Kerr and sons,Insley) ...... 206 J. L. Kulp. .. 678 Corundum-X-ray irradiation of . . 35 Differential thermal curves of pre- Courzite. (Thugutt) 371 pared mixtures of clay miaer- Crystal faces, the relative impor- als. (Grim)' 493 tance of. @uerger). 593 Diglycine hydrobromide, structure Crystal growth from the melt, ob- of. (Barney)...... 685 servationson (McCrone)..... 692 Discreditedminerals...... -374,485,702 Crystal growth, high temperature- Donnay, J. D' H. Hexagonal four- pressure.(Friedman)...... 689 indexsymbols 52 Crystal growth, physical,chemical - The superabundantindex in' phenomenain. (Egli, Smith). 687 the hexagonalBravais syrnbol 477 Crystallization pheromena in vol- Double-variation procedure, im- canic ejecta from Kilauea, Proved heating and circulating Hawaii.(Chapman)...... 105,197 systemfor.(I{urlbut)...... 201,487 INDEX 705

Dunhamite.(Fairbanks) ...... 372,701 Fisher,D. J.. . . . 199 DuRietz,T...... 255 Flagstaff Mountain, near Boulder, Colo., pre-Fountain weather- Efremov, N. The Development of ing.(Wahlstrom). .. . . 211 the Chemical Elements. Book Fluorine distribution in rocks. review. 699 (Barth)..:.... 195 Egli,P. H... .. 687 Fluorine, geochemistry of. (Was- Eitel, W. PhysikalischeChemie der serstein) 2lr Silikate. Book review. 481 Foster, W. R, Gravity-separation Ellipsoidalstructures in glass.(Os- in powder mounts as an aid to born).. 206 tlepetrographer..... Ellis, M. W. Twinned pseudo- Frank, A. J., Moynihan, C. S. morphs after pyrite from Barite at Pilot Knob, Mo.. . . 68r King's Butte, GreeneCo., Mis- Fourier syntlresis,electronic meth- souri. . . 583 of. (Birks) 685 Ephraim's Inorganic Chemistry. Fourier synthesizer,oscillographic. (Thorne,Roberts) Bookreview 97 (Pepinsky) 693 Epidote, IICar(A1,tr'e)Al2sisOrs, Fractography. (Zapfre). 696 stfucture of. (Ito). 309 Friedman,I. I.. . . 689 Epiianthinite and paraschoepite, Frohbergite,FeTe:, a new member new ufanium minerals from of the marcasite group. Belgian Congo. (Schoep, Stra- (Thompson) 2t0 diot). . 344 Frondel,C., Hurlbut, C. S.,Jr., and Epprecht,W...... 485 Collette, R. C. Synthesis of Ertl, T. Sodium bicarbonate from . 680 Coloradooil shale. lI7 200 Euchroite and chalcophyllite.(Ber- Fused wood-ash stones: fairchild- ry,Steacy). .. 196 ite, buetschliite and calcite, Eudidymite (IINaBeSLOa), struc- (Milton, Axelrod). .204,607 ture of. (Ito). . . 442 Evans,H. T.,Jr...... 687 Garrels,R. M... 689 Gem stones, r-ray irradiation of. Fahey,J.J...... ,... 198 (Pough,Rogers). 31 Fairbairn,H. W.. . 198 Gemstones,r-ray method of identi- Fairbanks,E. E. Naming of micro- fying(Gordon)...... 690 scopicoreminerals...... 701 Genesis of crystal forms and ra- ...... 372,484 tional explanationfor "law" of Fairchildite. (Milton, Axelrod). .204, 607 Bravais. (Buerger) 686 Fajans,K. Book reviews.. . .97,100, 103 Geologic thermometry, liquid in- Falkenstenite.(Barth) S7l clusions 2,375 Faust,G. T...... 199 Ganella, V. 200 Book reviews .481,698 Gilpin,V... 689 Fenimore,C. P.. . . 688 Glass,J.J...... 201 Ferguson,R. 8... lgg Glass structure, application of crys- - FeaOr MnsOr- ZnMn2Oa - ZnF e2Oa tal chemical principles to. (Lu- System, Mineralogicalaspects kesh).. 691 of (Mason) 426 Glaucodot, unit cell of. (Ferguson) 199 Fersmite.(Bohnstedt-Kupletskaya, Goldfi eldite :tellurian tetrahedrite. Burova) 373 (Thompson) 254 Fisher, B., memorialof. (Larsen).. 369 Gordon, S. G. Preservation of speci- 706 INDEX

mens of marcasite and Dvrite. 589 C. D. West, stability of. ..,....'..' 690 (Bruun, Barth). 92 Gordonite and paravauxite, rela- Holmes, R. J. with Switzer, G. Ap- tion of. (Nuffield). 205 paratus for obtaining powder- Graham,A. R.. . 201 type x-ray patterns from single Graphical derivation of the refrac- crystals. 351 tive index e for the trigonal Hugo pegmatite,Keystone, S. Da- carbonates.(Loupekine). . ... 502 kota, zones and replacement Graves, H. B. The Mineral Key. bodiesin. (Norton, Page). . . . 205 (Book review) 699 Hunt, W. F. Book reviews. . . . .253,699 Gravity-separation in powder Hurlbut, C. S,, Jr. An irnproved mounts as an aid to the pe- heating and cfuculating system trographer. (Foster). to use in double-variation Pro- Grim, R. E. Ditrerential therrnal cedure. ....201,487 curves of prepared mixtures of and Collette, R. C., with clay minerals. 493 Frondel, C. Synthesisof tour- Groutite, HMnO2, a new mineral maline. 680 of the diaspore-goethitegroup. Hutchinson, G. E.. . 702 (Gruner). 654 Eutton, C. O. Detennination of Gruner, J.'W. Groutite, IfMnO2, a xenotime. l4l new mineral of the diaspore- Nickelian epsomite from goethite group. . 654 NorthAuckland,NewZealand 553 Grundlagen der Stereochemie.(Nig- 702 gli) Book review. 100 Hvdrothermal alteration of the "porphyry copper" deposits. Hamburger,G...... 197 (Schwartz) 209 Handbook of Uranium Minerals. Hydrozincite,composition and unit (DeMente, Dake) Bookreview 698 cellof. (Ramsdell)...... 207 Haringtonite. (Wilson) 255 Harker,D...... 690 Identification and Qualitative Heazlewoodite.(Peacock) ...... 4U Chemical Analysis of Miner- 'W. Heinrich, E. Beyerite from als. (Smith) Book review... . . 253 Colorado. 660 Igneous Minerals and Rocks. Re-examinationof bokspu- flVahlstrom)Bookreview.... 697 tite.... 365 fngerson, E. Liquicl inclusions in with'Wolfe, C. W. Triplite geologic thermometry. . . . . 202, 375 crystalsfrom Colorado...... 518 Insley, H.. 206 Book review. 699 Insley, H., McMurdie, H. F.r Par- Henderson,D. M... 20I sons, W. H. and Steierman' Herzenberg,R...... 372 B. L. Some properties of Heteropolymolybdates, t-ray crys- materials used for jewel in- tallographyof. (Evans) ..... 687 strumetrt bearings. .. 1 HexagonalBravais symbol, the su- Interference figures, demonstration perabundant index in. (Don- of. (Winchell) 588 nay)... 477 International Geological Congress, Eleragonal four-index symbols. XVIII Session,London, 1948. 479 @onnay). 52 Iron-bearingmelilites in the quater- Hey,M. H..... 254 nary system CaO-FeO-MgO- High refractive index liquids of SiOz.(Schairer, Osborne)... .. 208 INDEX 707

Ito, T. The structure of epidote. . . . 309 Lembergite.(Sudo). 483 The structure of eudidy- Levin,S.B...... 686 mite, HNaBeSt Or. . 442 Lindberg, M. L.. . 203 Lindgrenite, unit cell by Buerger Jaffe, II. W. Reexamination of precessionmethod. (Barnes).. 6U sphene(titanite)...... 637 Lingafelter, E. C.. . 69I with Peterson, M. J. and Liquid inclusions in geologic tler- Kauffman, A. J., Jr. Spectro- mometry. (Ingerson)...... 202, 375 scope in determinative miner- Liroconite. (Berry, Davis) 196 alogy.. 322 Longs Peak-St. Vrain batholith, Jahns, R. H. Book review. 697 pegmatites associated with. Jensen,L. H.. . 691 (Boos). t96 Jewel instrument bearings, prop- Lonsdale, J. T. Pefla Blancd erties of materials used for, Spring meteoriter Brewster (Ttsley, McMurdie, Parsons, Co.,Texas...... 203,354 Steierman). I Lorenzenite and ramsayite' analy- Johnson,L. R... 690 sisof.(Sahama)..... 59 Loughlin, G. F. memorial of. @ur- KaSpar,J. V.. . . 255 bank).. 173 Kaufrman, A. J., Jr,, and Jafie, Loupelrine, I. S. Graphical deriva- H. W. with Peterson, M. J, tion of the refractive inder e Spectroscopein determinative for the trigonal carbonates. . . 502 mineralogy. . . 322 Lowe,K.E...... 203 Keller,W.D...... 202 Ludlamite from North Groton, Keller, W. F. Sulfide replacement N. Hamp. (Wolfe) 2ll of a fossilfern fruit. 468 Lukesh, J. S. and McCaa' D. G. Kennedy, G. C. Charts for correla- Anomalous tlennal efrect in tion of optical properties with quartzoscillator-plates...... 137 chemical composition of rock- 69r forrning minerals. 561 Luminescence sensitized (Schul- Kerr, P. F, Alteration studies . .158,202 man). . 694 -_ and Kulp, J. L. Differ_ ential thermal analysis of Makas,A. S.. . 692 siderite 678 Marcasie and pyrite, preservation Klein,E. E...... I97,691 of.(Gordon) ...... 589 Kodachrome slides for teaching Mason, B. Mineralogical asPectsof mineralogy and lithology. tle system FeaOr-MnsOr- (Meen) 204 Zn]0fr'zOrZn.FezQ+... 426 Kraus.E. H. Bookreview...... 104 Mavinite. (Rao). . 701 Kribergite. (Du Rietz) 255 McCaa, D, G. with Lukesh' J. S. Kruesi, O. with Smith, E. S. C. Anomalous therrnal effect in Polycrasein New York State. 585 quartzoscillator-plates...... 137 Kulp, J. L., with Kerr, Paul F. McCrone,W. C... 692 Differential thermal analysis McMurdie, II. F., Parsons, W. II. of Siderite...... 678 and Steiermaa, B. L. with Kyanophilite.(Rao). . . .255,701 fnsley, E[. Properties of mate- rials used for jewel instrument Larsen, E. S., Jr., memorial of B. bearings. 1 Fisher. 369 Meek,'W.8., with W'inchell'A. N. 708 INDEX

Birefringence-dispersion ratio Nickelian epsomite frorn North as a diagnostic .... .211,336 Auckland, New Zealand. (IJlt- Meen,V.B...... 204 ton)... JJJ of minerals. @uer- Niggli, P. Grundlagen der Stere- ger' Washken)...... 296 ochemie.Book review 100 Micaceous minerals in slate, inves- Niggli-Becke projection for rock tigation of. @ates). 625 analyses, applications of. (Ba- Micro-dunhamite(Fairbanks).... 683 con). . . 257 Microscopic ore minerals, naming Norbergite and chondrodite, syn- of.(Fairbanks)...... 683 thesis of by direct dry fusion. Milton, C. and Axelrod, J. M. @ankama). 146 Fused wood-ash stones: fair- Norton,J. J.. . . 205 childite, buetschliite and cal- Notes on Optical Mineralogy. cite, thefu essential constitu- (Tunell) Book review. 697 ents...... 204,607 Nuevite, new rare-earth mineral Mineral Key. (Graves)Book review 699 from California. (Murdoch). . 204 MineralogicalSociety of America Nuffield.E. W.. . 205 List of correspondents, fellows, membersand subscribers..... 2I5 oftedahl,c.. 700 List of former officers and meet- Ondiejite. (Ka5par) 255 ing places. 213 Optical figures obtainetl with the Nominationsfor officersfor 1948 486 reflecting microscope. (Neuer- Proceedingsof 27th annualmeet- burg).. 527 itrg.... 189 Osborn,E. F...... 206,208 Minervite and palmerite( : tarana- kite). (Bannister,Hutchinson) 702 Missouri fire clays, thermal analy- Pabst, A. Some computations on sisof(Keller,Westcott)...... 202 svanbergite, woodhouseite, Monochromatic light source for and alunite. t6 the petrographic microscope. Page,L. R...... :..:.:.. 205 (Townsend,Townsend)...... 367 Palmerite and minervite (:taran- Monteponite. (Fairbanks). 484 akite) Bannister,Hutchinson. 702 Moyd, L. Method for polishingdia- Paraschoepite and epiianthiaite, mond-drill core specimens.. . 368 two oew uranium minerals Moynihan, C. S. with Frank, A. J. from Belgian Congo. (Schoep, Barite at Pilot Knob, Missouri 681 Stradiot). 344 Murdoch,J...... 204 Paravauxite and gordonite, rela- tion of. (Nuffield) 205 Nahcolite from Colorado oil shale. Parsons,A. L.. . 206 (Ertl).. t17 Parsons, W. H., McMurdie, H. F. Nepheline, structure of. (Buerger, aad Steierma:r, B. L., with Klein, Hamburger)... 197 fnsley, II. Properties of mate- Nepheline, synthesis of. (Winkler). 131 rials used for jewel instrument Neuerburg, G. J. Optical figures bearings. 1 obtained with the reflecting 206 microscope...... 527 Peacock,M.4...... 207,484 New mineralnames. . .254,37I,483,700 Pearl,R. M., with Dake, H. C. The Newdata...... 484,701 Art of Gem Cutting. Book re- *"* view... 104 I::1':T':l::::'lll3;:;, n* Peia Blanca Spring meteorite, TNDEX 709

Brewster Co., Texas. @ons- drothermal alteration of. dale)... .. 203,354 (Schwartz) 209 Pennantite. (Smith, Bannister, Pough, F. H., and Rogers, T. If. H"y). . 254 Experiments in r-ray irradia- Pepinsky,R.... . 693 tionofgemstores...... 31 Peterson, M. J., Kauffmm, A. J., Powder-type r-ray difiraction pat- Jr., and Jaffe, H.'W. Spectro- terns from single crystals, ap- scope in determinative miner- paratus for, (Switzer, Holmes) 351 alogy.. 322 Prider, R. T. Chloritoid at Kal- Peterson, N. P. Phosphate miner- goorlie. 471 als in Castle Dome copper de- Probertite, unit cell by Buerger posit, Arizona 574 precessionmethod. (Barnes).. 684 Petrofabric diagrams, improved Pumice from Haylmore, Bridge method for counting out. River, British Columbia. (Ste- (Lowe). 203 venson). ..209,547 PhiladelphiaMineralogical Society 252 Pyrrhotite, cell and symmetry of. Phosphateminerals in Castle Dome (Buerger). 4ll copper deposit, Arizona. . . 574 @eterson). mineral analysis with Phosphorus, red, new crystal form Quantitative a recording r-ray diffraction of. (Klein) 691 spechometer.(Carl).... 508 Physical chemical phenomena in Quartz crystals with clay and fluid crystal growth. (Egli, Smith). . 687 inclusions. (Taber) 210 PhysikalischeChemie der Silikate. Quartz oscillator-plates,anomalous (Eitel)Bookreview...... 481 thermaleffects in. (Bottom) . . . 590 Pieruccini, R. with Carobbi, G. Quartz oscillator-plates,anomalous Spectrographic analysis of thermal effects in. @ukesht tourmalines from Elba with McCaa). 137 correlation of color and com- Quartz paramorphs after tridymite position. l2l from Colorado. (Ray). 643 Piezoelectric crystals, inorganic, Quensel,P...... 484 surveyof. (Johnson)...... 690 Quirke,T. T.. . Piezoelectricinvestigations, mak- ing oriented crystal plates for. (Bond). 686 Ramsayite and lorenzenite, analy- sisof.(Salama)..... 59 Piezoelectricity, an improved ap- Ramsdell, L. S. Studies on silicon paratus for detecting. (Stokes) 670 carbide. 64 Pitchblendeanduranite,(Rogers). 90 207 Plagioclase determination with Raakama, K. Synthesis of nor- four-axis universal stage. bergite and chondrodite by (Turner). 389 directdryfusion...... 146 Polarization correction in equi- Rao,B. R...... 255,701 inclination Weissenbergmeth- Ray, L. L. Quartz paramorphs after od, alinementchart for. (Bond) 686 tridymitefromColorado...... 643 Pollucite, analyses of minor con- Red Rosetungsten mine, Hazelton, stituents in. (Ahrens). 44 British Columbia, geology of. Polycrase in New York State. (Stevenson) 209 (Smith, Kruesi). 585 Richmondite.(Hutton) 702 "Porphyry copper" deposits, hy- Robertp,E. R. and Thorne, P. C. 710 INDEX

Ephriams Inorganic Chemis- Sjiigrenite.(Quensel) 4U try. Bookreview. 97 Slawson,C.B...... 694 Roebling Medal, sixth, presenta- Smith, E. S. C. and Kruesi, O. tion to C. S. Ross.(Schaller). . 163 Polycrasein New York State . . 5 85 Acceptanceof. (Ross)...... 166 Smith, O. C. Identification and Rogers, A. F. Uraninite crystals Qualitative Chemical Analy- with a new form, from Port- sis of Minerals. Book review.. 253 land,Conn...... 83, 208 Smith,P.L...... 687 Uraninite a:rd pitchblende Smith,W.C...... 254 . . . 90,208 Soapphases, liquid crystalline,neat Rogers, T. 8., with Pough, F. H. soap and middle soap, micro- Erperiments in x+ay irradia- scope identification of. (Rose- tionofgemstones.... 31 vear). . 693 Riintgenographich-Analytische Che- Sodium l-alkanesulfonates,epsilon mie. (Brandenberger) Book form of. (Lingafelter,Jensen). 691 review. 103 Sodium bicarbonate (nahcolite) Rooseveltite. (Herzenberg) 372 from Colorado oil shale. @rtl) ll7 Rosevear,F.B...... 693 Sodium bicarbonate (nahcolite) Ross, C, S., acceptance of Roeb- from Garfield Co.. Colorado. ling Medal. 166 (Glass). 201 Rowland, R. A. with Cuthbert, Souxite.(Herzenberg) 372 F. L. Differential thermal aaal- Spectroscopein determinative min- ysis of some carbonate miner- eralogy. (Peterson, Kauffmant als...... 111,198 Jaffe).. 322 Rutile titanium dioxide, prepara- Sphene (titanite), reexamination tion of. (Quirke,Steinman). . . 207 of. (Jaffe). 637 Spodumene, r-ray irradiation of. Sahnma, Th. G. Analysis of ram- (Pough, Rogers) 34 sayite and lorenzenite . 59 Stadnichenko, T, M. Memorial of Scapolite-r-ray irradiation of . . . . 39 V. I. Vernatlsky...... 181 Schairer,J. F.. . . 208 Steacy,H. R... 196 Schaller, W. T. Presentation of Steamboat Springs, Nevada, min- sixth Roebliag Medal to C. S. eralsof.(Gianella,White).....200 Ross... 163 Steierman, B. L., McMurdie, H. F. Schoep, A. and Stradiot, S. Para- and Parsons, W. H. with Ins- schoepite a:rd epiianthinite, ley, H. Properties of materials new uranium miaerals from used for jewel instrument $hinftelslwe, lelgian Congo. . 344 beariags. 1 Schulman,J. H.. . 694 Steinman,R...... 207 Schwartz,G. M.. . 209 Stereoscopic drawings of crystal Searlesitefrom Green River forma- structures.@ond). .. 454 tion of Wyoming. (Fahey, Stevenson,J. S.... 209 Axelrod). 198 Stevenson,L. S. Pumice from Hayl- Sensitized luminescence. (Schul- more, Bridge River, British man).. 694 Columbia. 209,547 Shand,S. J. Book revierv. 697 Stiepelmannite:florencite. (Yg- Siderite, differential thermal anal- berg). . 485 ysis of (Kerr, Kulp). . 678 Stokes, R. G. An improved appara- Silicon carbide, studies on. @ams- tus for detecting Piezoelec- dell). . . tricity.. 670 INDEX 7tl

Stradiot, S., with Schoep, A. Para- Triplite crystals from Colorado. schoepite and epiianthinite, (Wolfe,Heinrich). . . . 518 new uranium minerals from Tunell, G. Notes on Optical Miner- Belgian Congo.. 344 alogy. Book review. 697 Sudo, T...... 483 Tumer, F. J. Detennination of Sulfide replacement of a Trigono- plagioclase with four-aris uni- carpusfossilfernfruit.(Keller)468 versalstage...... 389 Svanbergite, woodhouseite and al- Turquoise, unit cell data. (Graham, unite, some computations on, Berry). 201 @abst). 16 Twinned pseudomorphsafter py- Svanbergite(X-ray data)...... l7 ritefromKing'sButte,Greene Switzer,G., and Holmes, R. J. Co.,Missouri.(Ellis)...... 583 Apparatus for obtaining pow- Twins and intergrowths. flMrinch) . 695 der-type x-ray diffraction pat- Two-circle goniometer, an easily terns from single crystals. . . . . 351 made. (Makas, West) . 692 Synthesisof tourmaline. (Frondel, Hurlbut, Collette) 680 Uraninite and pitchblende. (Rogers) System FeaOr-MnaOr-ZnMnzOt ....90,208 ZnFezO+,mineralogical aspects Uraninite crystals with a new form, of.(Mason) ...... 426 fromPortland,Conn.@ogers) Taber,s.. zro u*r'iu* ;; ;;;.kl;", .o"i,.l'''ot Thermal analysis of magnesium orientation of. (Yagoda)...... 212 minerals of Currant Creek magnesitedeposits of Nevada. Van Tassel,T...... 254 (Faust) 199 Vernadsky, V. I.,, memorial of. Thermal analysisof Missouri fire (Stadnichenko)...... 181 clays.(Keller,Westcott)...... 202 Thompson,R. M..210, 254,374,483,485 Wahlstrom,E. E. lgneousMiner- Thorne, P. C. and Roberts, E. R, alsand Rocks.Bookreview. . . 697 Fritz Ephraim's Inorganrc 2tr 'Washken, Chemistry.Bookreview...... 97 E., with Buerger, M. J. Thoulet's solution for heavy min- Metamorphismof minerals. . 296 eralseparation.(Weiss)...... 475 Wasserstein,B..... 2ll Three-dimensional projection in Watson,K. De P. Beryllium in peg- geologicaltraining.(Fisher). . 199 matites. 94 Thugutt, St.J.. . 371 Weiss, J. Thoulet's solution for Tourmaline pressuregauges. (Fron- heavy mineral separation. . . . . 475 del)... 200 West,C.D...... 692 Tourmaline,synthesis of (Frondel, Westcott,J.J...... r...... 202 Hurlbut,Collette)...... 680 White,D.E. .... 200 Tourmalines from the Island of Wilson, N.W... 255 Elba, spectrographic analysis Winchell, A. N., and Meek, W. B. of, with correlation of color Birefringence-dispersion ratio and composition. (Carobbi, asadiagnostic .....211,336 Pieruccini). 121 Winchell, H. Demonstration of in- Townsend,R. C. and Townsend, terferencefigures..... 588 D. R. Monochromatic light Winkler, H, G. F. The synthesis of sourcefor petrographicmicro- nepheline. 131 scope.. 367 Wiserite.(Epprecht) . 485 712 INDEX

Wolfe, C.'W. and Ileinrich, E,'W. X-ray hradiation of gem stones. Triplite crystals from Colorado 518 @ough,Rogers).. ... 31 2tL X-ray powder spectra of the ore Wood-ash stones, fused: fairchil- minerals,indexed. (Peacock). . 207 dite, buetschliite and calcite X-ray wave lengths. 591 (Milton, Arelrod) . .204,6A7 Yagoda,H...... 212 Woodhouseite.(r-ray data)...... 22 Ygberg, E. R.. . 485 Wrinch.D...... 695 2apff.e,C.A...... 696 Xenotine, determination of. (IIut- Zerfoss,S...... 696 ton)...... 14I Zinmer, P. W. Anhydrite a:rd g5tp- X-ray diffraction unit with six- sum in the LYon Mountain target cold cathode. (Fair- magnetite deposit of the north- bairn). . 198 eastern Adirondacks. . 647