TNDEX TO VOLUME 33

Leading articles are in boid face type; notes, abstracts and reviews are in ordinary type. Only minerals for which definite data are given are indexed. pH, Abrasion feld test for distin- Ballast sands of Japaneseballoons, Suishins minerals (Stevens, mineralogy of (Ross). 207 Carron). 31 Bannister,F. A... ..98,249,787 Absolute intensity scale for crystal Barium titanate, crystallographyof diffraction data (Harker). . . . 764 the polymorphic forms of. Achromatization of diffraction (Evans, Burbank) 758 lines.(Ekstein, Siegel)...... lJl Barium titanate, ferroelectric ac- Acta Crystallographica,Vol. l, Pt. tivitiesof. (Matthias)...... 769 1. (Review) 514 Barium titanate, permanent polar- Adamite from Ojuela Mine, Ma- iztion of a single crystal of. pimi (Mrose). Notes on oc- (de Bretteville, Levin, Estelle) 754 (Mayers, culrence Wise) 449 Barksdale,J. D.. . 192 Ahrens, L.H.. . . 19r Barrett,C. S.... 749 Allen, V. T., and f,'ahey, J. J., Barshad, I. Vermiculite and its Mansfieldite, a new arsenare relation to biotite. 655 the aluminum analogue of Barth, T. F. W. Memorial of Gre- scorodite,and the mansfieldite- gori Aminofi. 166 scorodite series. . t22 193 191 Basaluminite(Bannister, Hollings- AlPOa, crystal structure of. (Brill, worth). .. 787 de Bretteville) 750 Bear,R.S...... 749 Aluminum, role of, in rock-forming Becke line colors, use in refractive silicates. (Thompson) 2Og index deterrnination (Em- Aminofi, G., memorial of. (Barth). 166 mons, Gates). 612 Ammonium and potassium molyb- Becquerelite and billietite, addi- dotellurates.(Evans)... 758 tional data on. (Schoep, Stra- Anatase in fireclay deposits. aliot)... 503 (Brindley,Robinson). .. 94 Berry, L. G., and Graham, A. R,, Andrews,K.W...... 652 X-ray measurements on Angelelli,V...... 653 brackebuschite and hemato- Anthoinite. (Varlamofi) 3S5 lite.... 489 Anthophyllite series, new study of...... 193,750 (Rabbitt). 263 Billietite and becquerelite, addi- Atacamite twinning re-examined. tional data on (Schoep, Stra- (Donnay) 7s5 diot)... 503 Axelrod, J. M., X-ray data on Billietite.(Vaes)...... 384 mansfieldite, aluminian scoro- Biographical notices of mineralo- dite and scorodite. 133 gists recently deceased(1939- 195 47) (Spencer) 94 Blyth, F. G. H., Pyroxene from Bader, H. Degrees of freedom of Squitver dolerite, South simple symmetry operations. . 642 Shropshire.. 652 Bailly, R. Infra-red light for min- Bolduan,O. E. A.. 749 eral deternrination.... .192,Slg Boldyrev, A. K., memorial of. Ball, S. H., and Graf, D. L., with (Poir6)..... 516 Kerr, P. F. Carbonado from Bond, W. L., Transformation of Venezuela...... 2Sl axes.. . 703 791 INDEX

Bosazza, V. L., Petrography and Clay minerals, rehydration and de- Petrology of South African hydration of. (Grirn' BradleY) 50 Clays.Bookreview. ... 650 Clinopyroxenes, optical Property Bowen,N.L...... 193,210 curves.(Hess). . 199 Brackebuschite and hernatolite, Collagen fibrils, nature of the order r-ray measurements on. (Ber- of large size exhibited by, ry, Graham). . 489 (Bear, Bolduan) 749 Bradley, W. F., with Grim, R. E., Collagen, water uptake as evi- Rehydration and dehydration denced by its low angle *-ray of clay minerals. . . . . 50 diffraction pattern. (Wright). 780 Brasseur, If., Properties and Conductivity of dilute water solu- chemical formula of fourrnari- tions near critical temPera- erite. . . 619 ture. (Owen, Swinnerton).. 204 Brazilianite, second occuffence of. Connolly, J. P., memorial of. (Frondel,Lindberg). . .135, 196 (Graton). 172 Rredigite.(Tilley, Vincent). 786 Cornwallite,(Berry) 193 Brill, R. . . 750,751 Corundum deposits,'l-urret, Chaf- Brindley,G.W... ,. 94 fee Co., Colo. (Heinrich, Grif- Bromehead,C. E. N.. . . . 653 fitts)..... 199 Burbank,R. D.. 758 Crystal chemistry of elementsfrom Buttgenbach,H. Les Min6raux de actinium to americium.(Zach- Belgique et du Congo Belge. ariasen) 783 Bookreview.... 382 Crystallographic data, collection Buerger, M. J., The role of tem- and publicationof. (McCrone) 770 peraturein mineralog5r. . .101, 193 Crystallographic elements, rela- Structural nature of min- tionsamong.(Evans)... 60 eralizer action of fluorine and (Corrections) 380 hydroxyl 74+ Crystallographic Society of Amer- with Ilamburger, G. E. ica Proceedings 749 oftourmaline Cummingtoniteanalyses and r-raY _tr*o*" 1t1iil, data... .288'309 Curved crystal monochromator Ca:SiOr, high temperature orth- for study of low angle scatter- orhombic form, in Scawt ing. (Guinier, Fournet) 759 Hill contact zone, and in slags. Cuspidinein the systemCaO.SiOz (Tilley, Vincent) 94 . CaFg. (McCaughey, Kautz, Carbonado from Venezuela, (Kerr Wells).... 2OO Graf,Ball)... 251 Custerite-Cuspidine.('tilley) ... 100 Carl, H. F. Reliability of x-ray diffraction spectrometer for Dark-feld color immersion meth- quantitative mineral analyses 645 orl.(Dodge)... 194,541 Carron, M. K., wit! Stevens, R. E. Darneal, R. L, Immersion media Sirnple field test for distin- containing methylene iodide. 346 gurshing minerals by abrasion Davisson,J.W..... 754 pII. ... 31 de Bretteville,A., J...... 754 Chako,N.. 753 Decaborane,crystal structure of. Chapman, C. A. Memorial of Ter- (Kasper, Luicht, Harker) . 768 ence Thomas Quirke. 178 Degrees of freedom of simple sym: Chrysotile, thermal decornposition metry operations.(Bader)... 642 of.(Hey,Bannister)...... 249 Diderichite.(Vaes). 385 INDEX 793

Diorite, gabbro and related rocks, Falkmanite and yenerite, identity definitionsof. (Ellis)...... 652 with boulangerite. (Robinson) 716 Discreditedminerals...... 100,386, 654 Fankuchen, I.. 77s Dolomites,siliceous, earlier stages Faust, G. T. Therrnal analysis of in metamorphismof. (Tilley). 94 quartz and its use in calibra- Dodge, N. B. Dark-field color im- tion in therrnal atralysis studies JJ/ mersion method. . .194, 541 Feldspar, introduction in Red Donnay, J. D.H. Book review. 382 River district, N. Mex. (Park, McKinlay) 204 Donohue,J. 756 Feldspar, use in petrofabric analy- Dunham,K.C...... 249 sis of igneous rocks. (Snyder) 208 Druif,J. H.. . . 787 Fenimore, C. P. . . 755 Dry silicatesystems, present status Ferquson, R. 8.. . . 195 of laboratory studies.(Schairer) 207 Festschrift for Paul Niggli. (Re- view)...... 785 Earley,J.W...... ' 194 Fire hazard with C. D. West's high Egli, P. H. Survey of inorganic refractive index liquids. (Mil- piezoelectric materials. . . 622 ton). . 512 Ekstein,H..... 757 Fluorite-rare earth mineral peg- Electronicdigital computer.(Gold- matites of Chaffee and Fre- stine)...... 759 mont Counties, Colo. (Ifein- Ellis,S. E.. 652 rich). . . 6+ Elpasoiite aad hagemannite, new Foshag,W. F.. 195 data on. (Frondel). . . . 84 Foster, W. R. Useful aspects of the Emmons, R, C., and Gates, R. M. fluorescenceof zircon... .196,724 Use of Becke line colors in re- Fourier analysis, punched card fractive index deterination. 612 methodsof. (Thomas) 777 Bookreview...., 96 Fourier synthesizer, electronic. Erickson,M. P., with Stringham,B. (Pepinsky) 771 'Ihermal metamorphismof til- Fourier transforms, application to lite at Alta, Utah. . . 369 a crYstal structure anall'sis. Eruptive rocks. (Shand) Book re- (wrinch). . . 782 vierv...... 517 Fourmarierite, Properties and Estelle,H.. . 754 chemical compositior of. (Brasseur). 619 Ir,ulite.(Poldervaarl ) . 99 . Fox,P. P.... 196 Evans, H. T., Jr. Relations among crystallographic ele- Fournct,G... 759 ments. . 60 Francd, R. R., and Loewenstein, (Corrections) 380 W. Zirconium from the region Unit cell and spacegroup of Pogos de Caldas 142 of pirssonite. 261 Franckeite in relation to lengen- /J6 bachite(Nuffield)... 203 Frederickson, A. F. Differential 372 Fahey, J. J., with Allen, V. T. thermal curve of siderite '... Mansfieldite. A new arsenate, Mode of occurrence of ti- the aluminum analogue of tanium and zirconium in lat- scoroditeand the mansfieldite- erites . Jt+ scoroditeseries,...... 122 Frondel, C. New data on elPaso- 195,205 lite and hagemannite...... 84 794 INDEX

Tourrnaline pressure Venezuela. 251 gauges. I Graham, A. R.., with Berry, L. G. / .).t X-ray measurements on J, and Lindberg, M. L. Sec- brackebtrsdilte and hemato- olilTTi,.,nulite.... 489 :ii :""":::""' Graton, L. C. Memorial of Joseph P. Connolly. 172 Gardener, L. with Gruner, J. W. Griffitts. w. R.. 199 Book review. 382 Grim, R. E., and Bradley, W. F. Garnet and associated minerals of Rehydration and dehydration Barton Mine, North Creek, of clayminerals...... 50 N. Y., paragenesisof (Shaub). 208 Grossularite,stability relations of. Garnet-idocrase rock, a pseudo- (Yoder) 2ll jade from Placer Co., Cal. Growing crystals from solution. (Rogers) 206 (Holden) 766 'W'. Garrels,R.M...... 680 Gruner, J. Progress in silicate Gates, R. M., with Enmons, R. C. structures. 679,759 Use of Becke line colors in 197 refractive inder deterrrina- and Gardiner, L. Book re- tion... 612 view. . . 382 Geiger counter characteristics, ob- Guinier,A...... 759 servations on, by means of a grid-controlled tc-ray tube. Eagemannite and elpasolite, new (Pepinsky,Long)... .. 772 data on. (Frondel)...... 84 Geiger counter spectrometer, high Hagner, A. F.. . 203 intensity, with extended angu- Hallimond, A. F.. . 94 lar range.(Parrish, Hamacher) 770 Hamacher,E. A...... 760,770 Geiger counter spectrometer, im- Ifamburger, G. E., and Buerger, proved. (Hamacher, Parrish) 760 M. J. Stnrcture of tourmaline. Geiger counter spectrometer, pre- .5s2,76r ferred orientation and sample Harker,D...... 762,763,764,768 preparation for. (Pr6vot, Harrison, J. M.. . 197 Schwarz) 773 Hawley,J.E...... 198 Gems and Gem Materials. (Kraus, Eeirich, E. W. Fluorite-rare earth Slawson)Book review...-.. 382 mineral pegmatites of Chaffee Geological Congress, Interuational 249 and Fremont Counties, Colo.. 64 Glass, optical ptoperties of, from Pegmatites of Eight Mile Alamogordo, Neiy Mexieo. ' (Ross). 360 :11'T':-:*fl'''i'i;i,42o,sso Gnomonic projector lot x-ray Bookreviews...... 514,785 Lauegrams.(Gordon)...... 634 199 Gold crystals from the Soutlern Helvite, new occurrence of. (Weis- Appalachians.(Taber) . . . .208, 482 senborn) 648 Goldsmith, J. R.. . 197 Eematolite and brackebuschite, x- Goldstine,H. H.. . 759 ray measuremetrts otr. @erry, Gordon, S. G. Simple gaorronic r Graham). 489 projector for r-ray Lauegrams 634 Hemoglobins, crystalline. (Wrinch) 781 653,759 Henderson, E. P. with Perry, S. H. Graf, D. L., and Ball, S. H., with Livingstoo, Overton Co., Ten- Kerr, P.'F. Carbonado from nessee, meteorite. 639 INDEX

and Perry. Re-eramination Iwase,E.. 98 of the Soper, Oklahoma, mete- orite...... 692 Jacobson,R 98 Henvis,8.... . 754 Jafie, II. W., Sherwood" A. M., Hess,H.H...... 199 and Peterson, M. J. New Hewitt, D. F.. . 198 data otr schroeckingerite. 152 Hexagonal zonal equations. (Par- 766 sons).. 204 Jarlite.(Ferguson)...... 195 Hey,M.H...... 98.249 Jensen,L. H.. . 769 (Berry) Higginsite. 1g3 Johachidolite.(Iwase, Saito)..... 98 Holden,A.N...... 766 Hollingsworth, S. E. . 787 Karle,J.. 767 Holmes,R. J.. . . gg Karle,I.L...... 767 Howland,A. L... 766 Kasper,J.S...... 768 Hummel, F. A., with Roy R. and Kautz, K.. 200 Middleswarth, E. T. Magne- KCI crystals, formation from aque- siumpyrophosphate...... 459 ous solution at varying rates of Hurlbut, C. S., Jr. Mineral deter- evaporation.(Thielsch)...... 776 mination by meansof punched Kerr, P. F., Graf, D. L., and Ball, cards.. 508 S. H. Carbonado from Vene- Hydrazides of some m-aliphatic zuela.. 251 acids, *-ray crystallographic and Kulp, J. L. Multiple study of. (Lingafelter, Jensen) 769 difierential thermal analysis. . Hydrobasaluminite (Bannister, Hollingsworth)...... 787 Klo"t-"r,rrii" .na r.rin iura;'rljn'"t Hydrothermal quenching appara- (Earley) 194 tus, new. (Tuttle, Bowen). . . 210 Klockmann's Lehrbuch der Min- Hypertetrahetlral faces, charting eralogie.Bookreview...... 785 five, six, and seven variables Kraus, E. E., Presentation of the on.(Mertie). .. ..201,324 Roebling Medal of the Min- Hypothetical disorder and its use erlogical Society of America in crystal structure determina- to Paul NrCCIi.. f58 tions.(Harker)...... 762 Book reviews. .651,785 and Slawson,C. B. Gems Tmmersion media containing me- and Gem Materials. Book re- thylene iodide. (Darneal).... 346 view... 382 Index of refraction studies of iso- Kulp, J. L.,with Kerr, P.F. Multi- metric opaqueminerals. (How- ple differential thernral analy- land, Quigley) 766 sis...... 199,387 Infra-red light for mineral deter- mination.(BaiUy) ...... 192, 519 Larsen,E. S., Jr. Book review. . . . 517 Intensity in Debye-scherrer lines Laniite, green, from Stoddard, due to random orientation of New Hampshire. (Meyers). . 366 crystal grains, statistical fluc- Lazulite, scorzalite and veszelyite, tuation of. (Ekstein)...... 757 structural crystallography of. lron-wollastonites in contact (Berry) 750 skarns: an example from Skye Lead sulphahtimonides, synthesis (Tilley) 7s6 of. (Robinson) 206 Isotope ratios, a clue to age of Lehrbuch der Mineralogie. (Klock- marine sediments.(Wickman) 211 mann). Book review. 785 79o INDEX

Les min6raux de tselgique et du With r-ray notes bY Axelrod, Congo Relge. (Buttgenbach) J.M.. ... 133 Book review. . 382 Mason,B..... 200 L.evin,S. B. 754 Masuyite. (Vaes). 384 Lindberg, M. L., with Frondel, C. Mathews,W.H...... 210 Second occurrence of brazili- Matthews, F. W., with Mclntosh, anite...... 135,196 A. O. Hydrates of sodium tet- Lingafelter,E. C.. 769 raborate. ... 769 Livingston, Overton Co., Tennes- 747 see, meteorite. (Perry, Hen- Matthias,B.T... .. 769 derson)..... 639 Nlayers, D. E., and Wise, F. A' Loewenstein, W., with Franco, Notes on occurrence of ada- R. R. Zirconium from the re- mite... +49 gion of Pogosde Caldas 1+2 McCaughey, W. J. 200 Long,H. M., Jr.. . . . 772 NIcConnell, D. Nomenclature in Lonsdale,K. Noteson quantitative mineralogy: the basic for new analvsis bv r-rav diffraction mineralnames. .. 260 method.. '90 l\lcCrone, W. E.. 770 Loughlinite, a new hydrous magne- Mclntosh, A. O., and Matthews, sium silicate. (Fahey, Axelrod) 195 F. W. Hydrates of sodium tet- Lowe, K. E.. . 200 raborate Lucht, C. M. . . 768 769 204 Lukesh, J. S. Stnrcture-phases in McKinlay, P. F the silicate glass system CaO- Meixner,H.... 654 NazO-SiOz... /o Melilites, artificial, lattice parame- ters and interPlanarsPacings Machatschki, F. Vorriite und Ver- of.(Andrews).... 652 teilung der Mineralischen Melilites, isomorphic phenomena Rohstoffe. Book review 650 in. (Goldsmith). 197 Magnesium ammonium phosphate, Melmore,S...... 652 thermal decomposition of . 4Jv Mertie, J. B., Jr. Charting five, six, Magnesium oxide, chemical bond and seven variables on hyper- of. (Brill) /JI tetrahedralfaces. . 201,324 Magnesium pyrophosphate. (Roy, Metamorphic rocks of lower Me- Middleswarth, Hummel) 458 thow Valley, Wash. (Barks- Nlakas,A. S.. . 778 dale)..... 192 Malachite, unit cell of. (l{amsdell) 206 Metanilamido-pyrimidine, crystal Manganese oxide mineral from structure of. (Singer, Fan- Buchan, Victoria. (Samson, kuchen)..... 775 'Wadsley) 695 Meyers, T. R. Green lazulite from Manganeseprecipitation in magne- Stoddard,New llamPshire... 366 siumalloys, electron diffraction Nlicrowavediffraction, use in struc- studiesof. (Sturkey). . . 776 ture analysis.(Roth). . . 774 Manitoba, northern,regional meta- Middleswarth, E. T., and Hummel, morphism in. (Harrison) 197 F. A., with Roy, R. Magnesium Mansfieldite, a new arsenate, the pyrophosphate 458 aluminum analogu.eof scoro- Mielenz,R. C.. . . 202 dite and the mansfieldite-sco- Milton, C. Fire hazard with C. D. rodite series.Allen, V. T., and West's high refractive index Fahey, J. J. 122 liouids. "' "" 5r2 INDEX 797

Nlineralizer action of F and OH, (McCrone) 770 structural nature of. (Buerger) 744 Organic crystal structure deter- Mineralogical Society. of America minations. groping stages in. List of correspondents, fellow, (Donnay, Fenimore) 755 menbers, and subscribers... 2t4 Owen,G. E...... 204 Norninations for officers for 1949 517 Oxidation and reduction in geo- Proceedings of 28th annual meet- chemistry. (Mason) 200 ing at Ottawa, Canada. . 185 Oxygen, distribution in the litho- Mineralogical Society (London). sphere. (Barth) 193 .94.249,652 N{ineralogische'l-abellen (Strunz) Pabst, A., and SawYer, D. L. Tin- Book review. 95 calcodte crystals from Searles Nlinerals of Arizona. (Galbraith) Lake, Calif.. . . 472 (Second edition, revised) 93 Bookreview.... 650 Missouri River basin, upper, en- Palache,C..... 653 gineering geologic studibs in. Paraschoepite,crystals of. (Schoep, (Fox)...... 196 Stradiot)...... 513 Moorehouse, W. W. 202 Paricutin volcano,aqueous emana- Mrose, M. E. Adamite from Ojue- tion from. (Foshag) 195 la Mine, Mapimi, Mexico.... 449 Park, C. F., Jr. 2O4 Multiple differential thermal anal- Parrish,W.. . .. 760,770 ysis. (Kerr, Kulp) 199,387 Parsons,A. L. 204 Pearl, R. M. Popular GemologY. Neuerburg, G. J. Efiects of rota- Bookreview' 651 tion of objectives or optical Pecora,W. T.. 205 properties of opaque minerals Pegmatites, fluorite-rare earth in polarized light 496 mineral, of Chaffee and Fre- Sulfur as a nrountingme- mont counties, Col. (Heinrich) 64 dium for polishedsections.. 88 Pegmatites of Eight Mile Park' H. 203 Newhouse,W. tr'remort Co., Colo. (I{einrich). New mineral data . .99, 788 , 198,420,550 New mineral names. . 98, 384-6,653, 786 Pepinsky,R. . I I L, I t ! New minerals described S. II., and llenderson, E. P. Loughlinite.. 195 Perry, Livingston, Overton Co., Ten- Mansfieldite 122 meteorite. 639 Scorzalite. 205 tressee, with llenderson, E. P. Souzalite... 205 Reexamination of the SoPer, Nigerite. (Jacobson,Webb) (Ban- meteorite. . 692 nister, Hey, Stadler) 98 Oklahoma, Niggli, P. Acceptanceof the Roeb- Peterson, M. J., and Sherwoodt New lingMedal.. 161 A. M., witl Jaffe' II. W. 152 Niggli, Paul, Festschrift for. (l{e- data on schroeckingerite view). 785 Petrography and petrology of South Nomenclature in mineralogy; the African clays. (Bosazza) Book basis for new mineral narnes. review. 650 (McConnell).. .. 260 Petrography of a sample of bedrock Nuffield, E. W.. 2O3 from a deep well at RockawaY Park, Long Island,Net'York. Organiccrystals, nrorphological and (Roberts)' . 258 ootical characterization of. Phase-contrastmicroscopl', appli- 7e8 INDEX

cation to mineralogy and pe- due to peritectic reactionsin- trology.(Smithson)...... 652 volving partial dissociation. Phase determination with aid of (Hawley, Hewitt) 198 implicationtheory. (Buerger). 752 Punch figures in thallium halide Phase inequalities, relations be- crystals.(Davisson, Henvis). . 754 tween: Patterson function and Punchedcards, mineral determina- Buergerimplications.(Harker) 763 tion by meansof. (Hurlbut). . 508 Phosphates, mineralogy and ther- Pyroxene from Squilver dolerite, mal behavior of. I. Magne- South Shropshire.(Blyth). . . . 652 sium pyrophosphate. (Roy, Middleswarth, Hummel).... 458 Quantitative analysisby r-ray dif- Photoelastic properties of crystals. fraction methods. (Lonsdale). 90 (West,Makas)...... 778 Quantitative mineral analysis by Photomicrography by inclined il- *-ray diffraction,reliability of: lumination. (Ross). 363 (Carl). . 646 Piezoelectric crystals, observations Quartz, thermal analysis of, and its on (Van Dyke). 778 use itr calibration io thermal Piezoelectric crystalline quartz, analysis. (Faust). 337 domestic sourcesof. (Waesche) 255 Quenching apparatus, hydrother- Piezoelectriceffects in some uni- mal. (Tuttle, Bowen) 2rc polar crystals.(Jatre). 766 Quigley,M. D.. . 766 Piezoelectricmaterials, inorganic, T. T., memorial of. (Chap- crystal chemical relations in. Quirke, man). . . . 178 (Zerfoss) 784 Piezoelectric materials, inorganic survey of. (Egli), . 622 Rabbitt, J. C. A nes' study of the Pirssonite, unit cell and space anthophyllite series.. 263 group of. (Evans). 261 Radial distribution curves from electron diffracticn new Pirsson,L. V. and Knopf, A. Rocks ' data, and rock minerals. Book re- procedure for calculating. view... 96 (Karle,Karle) .. 767 Poir6, I. V. Memorial of A. K. Ranrsdelf, L. S.,.. .206,774 Boldyrev. 516 Rashleighite(Russell) 786 Polarizing microscope, improved. Relation of minor intrusives to III. Slotted ocular and slotted granite in Bryce Area, On- , objective. (Hallimond, Tay- tario. (Moorhouse)... 202 lor).... 94 Reliability of x-ray diffractionspec- Poldervaart,A...... 99 trometer for quantitative min- Popular gemology. (Pearl) Book eral analysis.(Carl). . . 645 review. 651 RhornbohedralMiller indices and Potash-rich rocks of the Esterel, hexagonal Bravais-Miller in- France. (Terzaghi). 18 dices, graphical method for Potassium nitrate, crystallization transforming.(Ramsdell).... 774 of. (Williams, Stine, Garrels). 7N Richetite. (Vaes). 384 Powder diffraction data from a Roberts, C. M. Petrograpby of a single crystal, apparatus for sampleof bedrockfrom a deep obtaining. (Matthews, McIn- well at Rockaway Park, Long tosh). . 769 Island, New York...... 258 Pr€vot,A..... 773 RobinsonK...... 94 Pseudo-exsolution intergrowths Robinson, S. C. Identity of falk- INDEX 799

manite and yenerite with Schirmerite,note on. (Wickman). . 262 boulangerite. 716 Schroeckingerite, new data on. 206 (Jafie, Sherwood, Peterson). r52 Rock alteration associated with Schuilingite.(Vaes). 385 thermalsprings. (White). . . .. 2rO Schwarz,G...... I tJ Rocksand rock minerals.(Pirsson) Scorzalite and souzalite, new phos- Book review. 96 phate minerals associatedwith Roebling Medal of the Mineralogi- brazilianite, Minas Gerais, cal Society of America, presen- Brazil.(Pecora, Fahey)...... 205 tation to Paul Niggli. (Kraus). 158 Scorzalite. (Berry) 750 Acceptanceof medal. (Niggli) 161 Scott,H.S...... 207 Ilogers, A. F. Book review...... 95 Seelandite:epsomite.(Meixner) . . 654 206 Selenio-siegenite.(Vaes) 386 Rogers-Low,B...... 774 Selenio-vaesite.(Vaes) . 386 Ross, Clarence S. Optical proper- Shand, S. J. Eruptive rocks. Book ties of glass from Alamogordo, review. 517 New Mexico. 360 Shaub,B. M.. . . . 208 Photomicrography by in- Sherwood, A. M., and Peterson, clined illumination. . . 363 M. J., with Jafre, If.'W. New Book review. 650 data on schroeckingerite. ... t52 207 Ship's loadstones.(Bromehead). . . 653 Rotation of objectives, efiect of, on Siderite, differential thermal curve optical properties of opaque of. (Fredericksgn)... . 372 minerals in polarized light. Siegel,S. lJt (Neuerburg). 496 Silica structures,crystals based on. Itoth,W. L...... 774 (Buerger) /JI Roy, R., Middleswarth, E. T., and Silicate glass system CaO-NazO- Ilummel, F. A. Mineralog;y SiOa structure phases in. aad thermal behavior of phos- (Lukesh). 76 phates. I. Magnesium pyro- Silicate structures, progress in. phosphate. 458 (Gruner). .679,759 Russell,A...... 786 Silicol carbide, E, type sfR. (Thibault). 588 Saito,N...... 9g Singer,J. : : . :. :: : I tJ Samson, H. R., and Wadsley, A. D. Skutterrudite series.(Holmes). . . . 99 A manganese oride mineral Slawson,C. B., with Kraus, E. H. from Buchan,Victoria...... 695 Gems and Gem Materials. Sandstone,fused by intrusive an- Book review. 382 desite, PalisadesDamsite, Ida- I lJ ho.(Mielenz) ...... 202 Smithson,F...... 652 Sanmartinite.(Angelelli, Gordon) . 653 Snyder,F. G...... 208 Sawyer, D. L., with Pabst, A. Tin- Sodium, new modificalion of. calconite crystals from Searles (Barett) 749 Lake,California..... 472 Sodium tetraborate, hydrates of. Schairer,J. F.... ZO7 (Mclntosh,Matthews)...... 747 Schoep, A., and Stradiot, S. Addi- Soper, Oklahoma, meteorite, re- tional data on becquerelite and examination of. (Eendersor, billietite. 503 Perry). 692 Crystals of paraschoepite. 513 Souzalite and scorzalite. new phos- Schomaker,V...... 756 phate minerals associatedwith 800 INDEX

brazilianite, Minas Gerais, BearpawMts., N'Iont.(Pecora) 205 'Ielluride Brazil. (Pecora,Fahey) minerals, pyrosynthesis Specific gravity, alignment chart of. (Thompson). 209 for calculatioo of. (Winchell). 353 Temperature, role of, in mineralo- Spectroscope,direct reading' ana- gy. (Buerger) ... 101,193 'I'emperature lytical.(Vreeland)...... 600 of formation from (Scott) 2O7 Spencer,L. J.. . . 94 fluid includions. ... ' Spheres,densest and least dense Terzaghi, R. D. Potash-rich rocks packingsof. (Melmore).. 652 ofthe Esterel,France. . . 18 Sradler,H. P.. . 98 Thallium and rubidium,ttniqtte as- Stevens,R E., and Carron, M. K. socialionin minerals'(Ahrens) 191 Simple field test for distin- Thallium halide crystals, behavior guishing minerals by abrasion of punch figuresin (Davisson, prr.... 3l Henvis)...... 754 Stine, L. O.. . . 780 Thermal analysis of quartz (Faust) 337 Storm King granite at Bear Mt., Thermal metamorphism of tillite N. Y. (Lowe) 200 at Alta, Utah. (Stringham, Stradiot, S., with Schoep, A. Addi- Erickson) 369 tional data on becquerelite Thibault, N. W. Alpha-silicon car- andbillietite.... 503 bide,tyPe sfR...... 588 Crystals of paraschoepite. JIJ Thielsch,H..... 776 St6ingham, 8., and Erickson, M. P. Thomas,L.H...... 777 Thermal metanlorphism of Thompson,J. 8., Jr.. 209 tillite at Alta, Utah. 369 Thompson,R. M...... 2Oq Structure determination, complete. Tilley, C. E. Iron-wollastonites in (Rogers-Low) I l+ contact skarns: an examPle Structure factors by punched card from Skye. '. 736 method, calculation of. (Don- 94,100,786 ohue.Schomaker)'.'.. ' "' 756 Tincalconite crystals from Searles Structure-phases in siiicate glass Lake, San Bernardino Co., (Lukesh). 76 Calif. (Pabst, Sawyer)... 472 Strunz, H. MineralogischeTabel- Titanium and zirconium in la- len. Book revier'. 95 terites, mode of occurrence. Studtite.(Vaes)...... 385 (Frederickson) 374 Sturkey,L...... 776 Tourmaline pressure gauges' Sulfur as a mounting medium for (Frondel). 1 polishedsections. (Neuerburg) 88 Tourmaline, structure of. (IIam- Swinnerton,A. C...... 204 burger, Buerger). 532 System H2O-HIPO4-AIPOr.(Gru- Transformationof axes. (Bond).. 703 ner). t97 Tuttle, O. F...... 193' 210 System MgO-SiOrHzO. (Bowen, Twinned intergrcwths of crYstals, Tuttle) . . 193 anall'sisof. (Slawson) 775 Sztrokay,K.. . 788 Two-circle goniometer, new. (Wolfe). .... 739 Taber, S. Gold crystals from the T],rolite, higginsite and cornwal- Southern Appalachians. . . .2O8,482 lite. (Berry) 193 -faylor,E.W...... 94 -felescoped, xenothermal mineral Vaes,J. F. . . .384,385, 386 associationin alkalic pegma- Vandendriesscheite.(Vaes)... 384 tites, Vermiculite Prospect, Van Dyke, K. C.. . 778 INDEX 801

Van Tassel,R.. .. 384 Wisaksonite.(Druif).... 787 Varlamoff, N.. . 385 Wise, F. A., with N{ayers,D. E. Vermiculite and its relation to bio- Notes on occurrenceof adam- tite. (Barshad).. 655 ire. . . 449 Veszell,ite.(Berr1') 750 Wolfe, C. W. A new two-circle Vibration of cn'stals. (Chako). . 753 goniometer...-... 739 Vincent,H. C. G. .9+,796 Wright, B. A. 780 Vorriite und Verteilung der Min- Wrinch,D... 781,782 eralischen Rohstoffe. (Ma- Wurtzite, 4H, 6H, 15R. (Frondel, chatschki)Book review 650 Palache) 653 Vreeland, F. K. Direct reading an- alytical spectroscope. 600 Xenoliths, partly vitrified, in pil- low basalt.(Watson, Mathews) 210 Wadsley, A. D., with Samson, X-ray diffraction, quantitative If. R. A manganeseoxide min- analysisby. (Lonsdale).. 90 eralfromBuchan,Victoria 695 X-ray diffraction, reliability of Waesche,H. H. Domestic sources quantitative anal_ysis by. of piezoelectric crystalline (Carl). . 646 quartz. z1s X-ray tube grid-controlled fine Watson,K. de P.. 210 focus,design and operationof. Weathering of plagioclase feld- (Pepinsky). 771 sparsto bauxiLe.(Allen) l gl Yenerite and falkmanite, identity Webb,J. S.. 98 with boulangerite. (Robinson) 716 jarlite, Weberite and observations Yoder,H. S.,J.. . . 2ll on. (Ferguson.) 195 Wehrlite. (Sztrokay). .. . 788 Zachariasen,W.H...... 783 Weissenborn, A. E. New occur- Zerfoss,S...... 784 rence of helvite. 648 Zircon, crystallographicdata .... 145 Wells, R. G.. 200 Zircon, useful aspects of the fluo- West, C. D.. 77e rescerceof. (Foster).... .196,72+ White, D. E.. 2t0 Zirconium from the region of Po- Wickman, F. E. Note on schirmer- gos de Caldas. @ranco, Loe- rte. . 262 wenstein) .. 142 211 Zonedmetasomatic gneisses related Williams,V. C.. ?80 to structure and temperature, Winchell, H. Alignment chart for Laramie Range, Wyo. (New- calculation of specific gtavity. 353 house,Hagner)...... 20i