INDEX TO VOLUME 18

Leading articles are in bold face type; notes, abstracts and reviews are in ordinary type. Only minerals for which definite data are given are indexed.

Accuracyof mineralogicalmeas- 1li urements.(Hey)...... 420 and Tunell, G. Space Allophane: optical data and lattice and optical orienta- analysis....:...... 372,378 tion of chalcanthite. (Weis- Alteration of galena to angle- enbergmetlod). . 187 site to cerussite. (Swartz- Bauer,L. H. and Berman, H., low). 174 Barium-muscovite from Alty, S. W., Authigenic rour- Franklin,N. J...... 30 maliae from Lower Devo- Bauer, M.-Schlossmacher, K., niansediments... 351 Edelsteinkunde.[Book re- Ammonioborite, a new mineral. viewl. . 80 (Schaller). 480 Bavenitel symmetry atrd unit Anapaite,crystallographic notes cell. (Ksanda, Merwin) 341 on. (Palache,LaForgd) .. 116 Becquerelite:optical data.. 2l Angle-tables, crystallographic. 312 Beidellite in Cretaceousclays Ankerite from Bethesda, Md. of N. J. (Hawkins) ll7 (Ulke)...... 3r2 Berman, II. and Bauer, L. H., Apatite: optical data. 372 Barium-muscovite from Artificial spherulites. (Morse, Franklin,N.J...... 30 Donnay) 66 and Palache,C., Oxida- Ashcroftine (kalithomsonite): dation products of pitch- optical and r-ray d,ata. blende from Bear Lake. .. 20 (Hey,Bannister)..... i8,358 Beryl,N. Carolina...... 152 Augite:opticaldata...... 372,378 Boericke, W. F., Prospecting and operating small gold Baker, C. L., Woodward,H. T., placers.[Book review].... 367 and Pabst, A., Four crys- Bowen, N. L., Non-existenceof talline hydrates of sodium echellite ...... 31 'metasilicate..... 206 Bracewell,S.. ... 222 Bannister,F. A... . . 78,79,222,3SB Braggite. (Bannister). 79 Barium-muscovitefrom Frank- Bramlette, M. N. and Posnjak, lin, N. J. (Bauer,Berman) 30 8., Zeolitic alteration of Barium plagioclase feldspar. pJrroclastics. 167 (Nockolds,Zies)...... 420 Brammall,A.... 222 Barnes, V. E., Metallic minerals Brandt,F.... 222 in anhydrite cap rock, Buck, L. A., Hawkins, A. C., Winnfield salt dome, La.. . 335 and Stollman, A., Micro- Barth, Tom F. W. Iso-ortho- scopic minerals of clays of ctasein Virginia...... 478 Middlesex Co., N. J. 160 [Book review] 310 Buerger, M. J., Optical proper- and Ksanda, C. J. Crys- ties of ideal solution im- tallographic data on mel- lite 8 --'":'::li"'ll ii,l?: 553 554 TH E AM ERICAN M I N ERALOGI ST

Bulfonteinite. (Parry, Williams, Cooperite.(Bannister)... 79 Wright). 32 Cordierite, optically positive, Burbank, W. S,, Manganese from N. W. Territories, minerals of Sunnyside Canada.(Rutherford).... 216 veins, Eureka Gulch, Colo. 513 Coronadite "redivivus." (Lind- Bufler, R. D., Immersioa liquids gren).. 548 of intermediate refraction Corundum,N.Carolina..... 150 (1.450-1.630). ..111,386 Corvusite and rilandite, new minerals from Utah-Colo- Camera lucida in crystal draw- rado carf,otite region. ing. (McNabb, McNabb). 14 (Ilenderson,Iless)...... 195 Carbonado, structure of, Crestnore co[tact rocks, tex- (Fettke, Sturges). 172 ture of. (Dunham)... .. ' 474 Carnegieitesolid solutions.(Til- Crystal cavities in lavas from ley, Schairer).. 113 Hawaii.(Dunham)..... 369 Ceylon gem field, a day in. Crystal drawing, camera lucida 14 (Gillson). 300 Crystal structure of Potassium Chabazite: optical data and dithionate. (Huggins) 455 analysis. 372 Crystallography, MineralogY, Chalcanthite, space lattice and Structures.(from Vol. VIII optical orientation. @arth, and IX of Annual Tablesof Tunell). .. 187 Constants)(Niggli' Brand- Chappell, W. M., Paulopost enberger and Mathieu.) stilbite in the Camas Land lBook review] 367 sill, ChelanCo.,'Wash.... 440 Chrysoberyloccurrence.:..... 502 Deer Creek, Wyo., intrusive, Qinn4f41 and associatedmin- structure and alteration of. erals from Pike Co., Ark. (Rouse). 117 (Sohlberg)...... 1 Descriptive petrograPhYof the Clay and bauxite minerals. igneousrocks. Vol. II. The (Tomkeieff) 419 quartz-bearing rocks. (Jo- Clays of Middlesex Co., N. J., hannsen)[Book review]'.. 311 microscopic minerals of. Determinants applied to crys- (Hawkins, StolLnan, Buck) 160 tallography.(DonnaY)..'. .116 Cl'noptilolite:analysis. 170 Determination of rock constitu- Coil, F., Chemical conposition ents by semi-micro meth- of leucoxene in Permian ods.(Guthrie,Miller).'... 78 of Oklahoma. 62 Diamond, genesisof . (Williams) Columbia River basalt.differen- fBook review] 176 tiationin.(Fisk)...... ll7 Diamond,N. Carolina...... I49 Colusite, a new mineral of the Dickite:opticaldata...... 5 sphalerite group. (La:rdon, Differentiation in Columbia Mogilnor). ..tI4,528 River basalt. (Fisk) ' . ll7 Colusite, x-ray examination of. Differentiation in intrusive (Zachariasen) 534 stocks in the Magdalena Contact metamorphism of On- district, N. Mex. (Kosch- awa batholith, Piscataquis mann). . ' 116 Co.,Maine. (Philbrick)... 116 Directory of American and Ca- JOURNAL MINERALOGICAL SOCIETY OF AMER]CA .)55

nadian mineral collections. Fisher, L. W., Mineral localities (Gordon).313, 359, 407 ,457 ,504 in Maine 501 Dixon,B.E...... 77 Fisk, H. N.. . . Donnay, J. D. II. and M6lon, Foshag,'W. F., Sulfohalite and J., Haiiy-Bravais lattice other rninerals from the and other crystallographic Otjiwalundo salt pan, S.W. data for sodium molybdo- Africa...... 431 tellurate. . 11) )'.)< and Morse, H, W., Ar- Gallium in lepidolite. +54 tificial spherulites 66 Garnet in the Dartmoor gran- 116 ite; its petrographic signifi- Drugmen,J.. . 79 cance. (Bramma.ll. Brace- Dunham, K. C., Crystal cavities well)...... 222 in lavasfrom flawaii..... 369 Garnet, N. Carolina 155 Texture of Crestmore Garnets frorn Sierra Tlayacac, contactrocks.. 474 Mexico. (McConnell)... 25 and Larsen, E. S., Til- Gems and gem minerals of N. leyite, a new mineral from Carolina. (Pratt). 148 contact zose at Crestmore, Genesis of the diamond. (Wil- Catif...... 469 liams) fBook review]. . . .. r76 Duparcite. (Nicolet) 180 Gieseke, C. L. (biographical note). . 78 Gillson, A day in a Ceylon Echellite, non-existence of. J.L., gem feld. 300 (Bowen) .. 3I Girnarite. (Mathier, . 5r2 Eckel, E. B., Stability relations Jhingran) of a Colorado pisanite. Cismondite: optical data...... 378 Glass, and lfenderson, (cuprian melanterite). . 449 J. J. E. P., Laumontite and Edelsteinkunde.(Bauer) [Book thomsonite from Table reviewl 80 Mt., Colo. 402 Edingtonite. (Hey) 420 Glauberite crystals from West Emerald,N. Carolina .. 152 Paterson, (Hawkins) zlJ Emplectite and the zinkenite N. J. late formation in group. (Palache, Peacock) Gneisses of a the Cascades, Wash. (Rich- ... ..t16,277 arz). . . 115 Enalite.(Kimura, Miyake) ... 223 Gordon, S. G., Directory of Epistilbite:opticaldata..... 380 American and Canadian Error in determination of sym- mineralcollections.: .... metry from optical extinc- . .313,359, 407 tionangles.(Hey)..... 309 ,457,504 Book 368 Eudidymite, crystallographic review...... Gumucionite. (Herzenberg) 359 notes. (Palache, LaForge) 116 Gunnell,E. M., Photo-lumrnes- cenceof Illinois fluorite and Fairchild, J. G., Artitrcial jaro- zinc minerals and associ- qitesl separation of potas- ated species from Joplin, sium from cesium. 543 Mo..... 68 Fettke, C. R. and Sturges, F. Guthrie, W. C. A. and Miller, C., Structure ofcarbonado. 172 c. c... 78

";i't 5s6 TH E AMERICAN MINERALOGIST

Haan, J. H., Kristallometrische nate.. .. 455 determineerings-methoden. Hunt, W. F., Book review ... 367 [Book review] 310 Hydronephelite: optical data Harbortite.(Brandt) ...... 222 andanalysis. ..372,378 Harcourt, G. A., Brown tour- maline from Frontenacand Immersion liquids, ideal' opti- Renfrew Co., Ont. 356 cal properties of. (Buerger) 325 I{aiiy-Bravais lattice and other Immersion liquids of interme- crystallographic data for diate refraction (1.450- sodium molybdo-tellurate. 1.630)(Butler)...... 111,386 (Donnay,M6lon).. . .. 112,225 Indian meteorites,list of. (Sil- Hawkins, A. C., Glauberite berrad).. .. 78 crystals from West Pater- Iso-orthoclase, occurrence in son,N. J.. ... 273 Virginia.(Barth)...... 478 Twisted millerite crys- tals... 118.274 Jarosites, artificial; separation It7 of potassium from cesium. Stollman, A., and Buck, (Fairchild). 543 L, A., Microscopic minerals Jhingran, A. G. 5r2 of clays of Middlesex Co., Johannsen, A., Descriptive pe- N. J.. . 160 trography of igneous rocks. Henderson, E. P., Triplite from Vol. II. Quartz bearing Argentina 104 rocks. IBook review] 311 and Glass, J, J., Lau- Johannsenite, a new manganese montite and thomsonite pyroxene.(Schaller).. ... 113 from Table Mt.. Colo.. 402 and Hess, F. L., Cor- Kennard, T. G. and Rambo, vusite and rilandite, new A. I., Rubidium, gallium minerals from Utah-Colo- and thallium in lepidolite rado carnotiteregion .... 195 from Pala, Calif... 454 Hermelin, S. G., Report about Kerr, P. F., Memorial of George minesin U.S.A.1783 [Book F. Kunz... 9l reviewl.... 368 115 Herzenberg,R...... 223,359 Kimura, K.. . 223 Iless, F. L. and llenderson, Kolbeckine.(Herzenberg)... 223 E. P., Corvusite and rilan- Koschmann,A. H... 116 dite. new minerals from Kraus,E. H., Bookreviews.. 80, 176 Utah-Colorado carnotite Krieger, P., Occurrence of region.. .. 195 strootianite at Sierra Mo- Heulandite: optical data and jada, Mexico. ..1I4,345 analysis...... 380 Kristallometrischedetermineer- Hexammine-cobalti-perchlorate : ings-methoden. (Haan) crystallography...... 19 [Bookreview].... 310 Hey,M. H...... 79,309,358,420Ksanda,C. J...... 112,ll7 and Bannister,F. A.. .78, 358 and Bartl, T. F. W.' Hiddenite,\. Carolina...... 154 Crystallographic data on Huggins, M. L., Crystal struc- mellite. 8 ture of potassium dithio- and Merwin, H' E., JOARNAL MINERALOGICAL SOCIETY OF AMERICA 557

Bavenite, symmetry and ter with variable refracting unitcell...... ' ... 341 angle..... 133 Kunz, George F., memoriat of. McNabb, W. M. and McNabb, 'W., (Kerr). 9l J. Use of camera lucida Kunz, GeorgeF., the mineralo- in crystal drawing. 14 gist. (Whitlock) . 76 Melilite: optical data.. . 372 Mellite, crystaltographic data LaForge,L.. . 116 on. (Barth,Ksanda).. ... 8 Landes, K. K., Origin and clas- M6lon, J. and Donnay, J. D. sificationofpegmatites. 33, 95 If., Crystallographic data Landon, R, E. and Mogilnor, for sodium molybdo-tel- A. H., Colusite,a new min- lurate.. 112,225 eral of the sphalerite group Mercury in native silver, (New- 114,528 house) 295 Lane,A. C... 113 Merwin, H, E. and Ksanda, Larderellite:optical data.. . . 485 C. J., Bavenite, symmetry Larsen, E. S. and Du.ham, andunitcell.... 341 K. C., Tilleyite, a new min- Mesolite.(Hey). 309 eral from contact zone at Metallic minerals in anhydrite Crestmore,Calif...... 469 cap rock, Winnfield salt -Bookreview. ... 311 dome,La.@arnes).. ... 335 Laumontite and thomsonite Meteoric iron found near Kyan- from Table Mt., Colo. cutta, S. Australia. (Spen- (Henderson,Glass).. .. 402 cer)..... 77 Laumontite: optical data and Meteoric irons and silica glass analysis. 380 from meteorite craters of Legrandite. (Drugmen, Hey). . 79 Henbury and Wabar. LeMesurier,C. R... ..- .. 512 (Spencer) 221 Lepidolite, occurrence of Rb, Meteoric stone from Suwahib, Gaand Tl...... 45+ Arabia. (Smith) 78 Letovicite.(Sekanina)... 180 Meteorite, stony, from Ne- Leucoxene in Permian of Okla- braska.(Nininger)...... 56 homa, chenical composi- Miller,C.C...... 78 tionof.(Coil)..... 62 Millerite crystals, helically Lindgren, W., Coronadite "re- twisted.(Hawkins). . ..118,274 divivus" 548 Mineralogical Society of Amer- ica. Proceedingsof XIII Maine mineral localities,(Fish- annualmeeting.... 106 er)...... 501 List of former officers Maaganese minerals of Sunny- and meetings. ll9 side veins, Eureka, Gulch, List of fellowsand mem- Colo.@urbank)...... ) l.t bers... l2l Marshall,P...... 180 Nominations of officers Mathier,K. K...... 512 Lor1934. 406, 511 McConnell, D., Garnets from Mineralogical Society of Great Sierra Tlayaeac, Morelos, Britainand Ireland...... Mex... L3 . .77,22r,309,419 Mclellan, R. D., Refractome- Mineralogy, the new (Winchell) 81 TfrE AM ERICAN MIN ERALOGIST

Mines in U.S.A. 1783. (Her- Oxalato-tetrammine-cotialti- melin) fBook review]. . . . . 368 chloride: crystallography.. 17 Minyulite. (Simpson, LeMesu- Oxidation products of pitch- rier)... 512 blende from Bear Lake. Miyake,Y..... 223 (Patache,Berman)...... 20 Mogilnor, A. H. and Landon, R.E,, Colusite,anewmin- Pabst, A., Bakert C. D., and eralofthesphaleritegroup. 528 Woodward, H. T., Four Monazite crystal, large, from crystalline hydrates of so- N. Car.(Schaller). 435 diummetasilicate...... 206 Morse,H. W. and Donnay,J. Palache,C... '.. .. 115'116 D. H., Artificial spheru- and Bernan, II.; Oxi- lites.. . 66 dation products of pitch- Mottramite and psittacinite, blende from Bear Lake. . . 20 identity of, with cupro- and Peacock, M. A., descloizite. (Bannister) . . . 222 Emplectite a:rd the zinken- Mourant,A.E... 309 itegroup. '.'..,.. 277 Myers, W. M., Book review.. 367 Parry,l. ?') Peacock, M. A. and Palachet Nephelite: optical data and C.,Emplectiteandt,hezink- analysis ...... 372 enitegroup. ...t16,277 Newhouse, TI. H., Mercury in Peoples,J. W... ll7 trative silver. 295 Pegmatites, origin and classifi- New mineralnames; new data catiotrof.(Landes)...... 33'95 ...... 32,79;t79,222,358,510 Pegmatitesof PikesPeak re- New York Mineralogical Club gion, Colo. (Palache,Over) 115 . . . .74,131,177-8-9,219-20-21 Philadelphia Mineralogical So- Nickel-ironin silicaglass from ciety. ' .3I,77 , t76, 177, meteoritecrater at Wabar, ..22L'309'358'419' 510 Arabia.(Spencer)...... 419 Philbrick,S. S.... 116 Nicolet, S. E.. . . 180 Phillipsite: optical data and Nininger, H. H., Second stony analysis. 372 meteorite from Nebraska. 56 Photography for the miaeralo- Niter,structureofthepolymor- gist.(Stephens)...'...... 248 phic forms of. (Barth, Photoluminescenceof Illinois Ksanda)...... ll7 fluoriteand zinc minerals Nockolds,S. R.. . . 420 and associatedspecies from North Carolina gems ard gem Joplin, Mo. (Gunnell). ' . ' 68 minerals.(Pratt)...... 148 Piedmontite in quartz-musco- vite schist from N. Zea- Objective,new, for petrographic land. (Turner) 309 microscope. (Slawson). . . . ll2 Pietlmontite from ShadowLake' Odman,O...... 224 Madera Co.,Calif., chemi- Olivine: optical data...... 378 cal and optical study of. Optical properties of ideal solu- (Short). 493 tion irnmersion liquids. Pirssonite: optical and crystal- (Buerger). 325 lographicd,ata...-...'... 432 Over. E.. 115 Pisanite, stability relatiotrs of. JOURNAL MINERALOGICAL SOCIETY OF AMERICA 559

(Eckel). 449 Ramdohr,P...... 224 Pitchblende,oxidation productS Read,H. H... . . 77 of. .. . 20 Refractive index determina- Plane angles in geometrical tions with glass powder. crystallography. (Rogers) . 116 (Sueno)...... 421 'Portlandite, new mineral from Refractometer with variable re- Antrim. (Tillev) 419 fracting angle. (Mclellan) 133 Posnjak, E. and Bramlette, M. Richarz,S...... 115 N., Zeolitic alteration of Ritandite and corvusite. nevv pyroclastics. 1()/ minerals from Utah-Colo- tt2 rado carnotite region. Potassium dithionate, crystal (Ilenderson,Ifess)...... 195 structure of. (Huggins). . . 455 Rogers, A. F., Structural crys- Potassium sulphate : crystallog- tallography. 538 raphy.. 16 .....111,116 Pratt, J. H., Gems arrd gem Rouse,J.T...... ll7 minerals of N. Carolina. . . 148 Rubidium in lepidolite. 454 Prospectingand operatingsmall Ruby, N. Carolina. 151 gold placers. (Boericke) Russel,A...... 78 [Book review] 367 Rutherford, R. L., Optically Psittacinite and mottramite, positive cordierite from identity with cuprodescloi- N.W. Territories, Canada, 216 zite.(Bannister)...... 222 Ptilolite: optical data and anal- Sand-barites of Oklahoma, ori- ysis... 380 ginof. (Tarr). ..114,260 Pyrite-marcasiterelation. (Buer- Schairer,J. F.... 113 ger)... 113 Schaller, W. T., Ammoniobor- Pyrite or marcasite concretions, ite, a new mineral. 480 x-ray study of, (VanHorn, Large monazite crystal VanHorn)...... 112,288 fromN.Catolina...... 435 Pyroclastics, zeolitic alteration Tephroite crystal from of. (Bramlette, Posnjak).. 167 Franklin Furnace,N. J,. . . 59 Pyrrhotite in vein-like masses, 113 in chalcopyrite from Que- Schlossmacher,K.-Bauer, M. bec.(Stevenson)...... 114,445 Edelsteinkunde. [Book re- viewl.. 80 Quartz, cleavageand parting in. Schoep,A...... 179 (Rogers) tll Schoepite:optical and crystal- Qua*z-kyanite rocks {rom lographicdata... 2l Shetland Islands,and their Sekanina,J...... 180 bearing on metamorphic Short, A. M., Chemical and op- differentiation.(Read).... 77 tical study of piedrnontite Quartz, N. Carolina. 156 from Shadow Lake, Ma- dera Co., Calif. . 493 Rambo, A. I. and Kennard, Silberrad,C. A... 78 T. G., Rubidium, gallium Simpson,E. S... . 512 and thallium in lepidolite Slawson,C. B... T12 from Pala. Calif.. . 454 Smith, W. Campbell. 78 560 THE AM ERICAN MI N ERALOGIST

Sodium metasilicate, four crys- Symbols of crystal optics. talline hydrates of. (Baker, (Rogers) 111 Woodward,Pabst)...... 206 Sodium molybdo-tellurate, Tarr, W. A., Origin of sand-bar- Ilaiiy-Bravais lattice and ites of lower Permian of other crystallographic data. Okla.homa. ....114,260 (Donnay,M6lon)...... 112,225 Tenorite, atomic structure and Sohlberg, R. G., Cinnabar and geometrical constants. (Tu- associated minerals from nell, Posnjak,Ksanda). . . ll2 PikeCd.,Ark...... 1 Tephroite crystal from Franklin Spencer,L.J...... 77,221,419 Furnace, N. J. (Schaller). . 59 Spherulites,artificial...... 66 Tilley,C.E...... 113,419 Stability relations of a Colorado Tilleyite, a new mineral from pisanite. (Eckel). 449 contact zotre at Crestmore, Stephens, M. M., Photography Calif. (Larsen, Dunlam). . 469 forthemineralogist...... 248 Thallium in lepidolite. 454 Stevenson, J. S., Vein-like Thenardite. .. 434 masses of pyrrhotite in Thomsonite, dehydration of . chalcopyrite from Quebec (Mourant) 309 114,445 Thonsonite a:rd laumontite Stewartite. (Williams) 224 from Table Mt., Colo. Stichtite from Shetland.(Read, (Ilenderson,Glass)...... 402 Dixon). . . 77 Tomkeieff, S. I. .. 4t9 Stilbite:optical data...... 378 Tourmaline, authigenic, from Stilbite, paulopost, in Camas Lower Devonian sedi- Land sill, Wash. (Chap- ments. (Alty). 351 pell)... 440 Tourmaline. brown, from Fon- Stillwater igneous complex, tenac and Renfrew Co., Montana.(Peoples)...... lI7 Ont.(Harcourt)...... 356 A., Buck, L. A., and Triclinic space lattice, deter- Stollman, 'Weissen- Hawkins, A. C., Micro- mination of, by scopic ninerals of clays of berg x-ray goniometer. MiddleserCo.,N. J. .... 160 (Tunell)...... 181 Strontiaaite at Sierra Mojada, Triplite from Argentina. (Hen- Mexico. (Krieger)...... 114, 345 derson). 104 Structural Crystallography. Trona. .... ' '.. 432 (Rogers)...... 538 Tuhualite.(Marshall)...... 180 Sturges, F. C. and Fettke, C. Tunell, G., Deterurination of R., Structure of carbonado 172 triclinic space lattice by Sueno, T., Standard glass Weissenbergmethod..... 181 powders in refractive inder Book review. 310 determinations...... 421 t12 Sulfohalite and other minerals and Barth, T. F. W.' 'from Otjiwalundo Salt Pan, Space lattice and optical S.W. Africa. (Foshag).... 431 orientation of chalcanthite. 187 Swartzlow, C., Alteration of Tungsten deposit at Mill City, galenato anglesiteto cerus- Nev. (Kerr) . 115 site...... 174 Turner,F. J.... 309 TOURNAL MINERALOGICAL SOCIETY OF AMERICA 561

Ulke, T., Ankerite from Be- ley, Durham. (Russell). . . 78 'Woodward, thesda,Md.... 312 H. T., Baker, C. L., Uraninite age, five-fold check and Pabst, A,, Four crystal- of. (Lane) 113 line hydrates of sodiirm Uranophane. 23 metasilicate 206 Wright,F. E..... 32 Valferiite. (Ramdohr, 6dman). 224 Vandenbrandeite.(Schoep)....t79 X-ray examination of colusite. Vanl{orn, F. R. and VanHorn, (Zachariasen) 531 K. R., X-ray stucly of py X-ray study of pyrite or marca- rite or marcasite concre- site concretions. (Vanllorn, tions.. .112.288 VanHorn)...... 112,288 'Weissenberg x-ray goniometer, use in triclinic system. Zachariasen, W. H., X-ray ex- (Tunell). ... .181,187 aminationof colusite. ... 534 Whitlock, H. P., George F. Zeolites, studies of. IV. Ash- Kunz, the mineralogist. . . 76 croftine. V. Mesolite. VL Williams. A. F., Genesisof the Edingtonite.(Hey). . 78,309,420 diamond.[Bookreview]. .. 176 Zeolitic alteration of pyroclas- . ..32.224 tics. (Bramlette, Posnjak). 167 Winchell, A. N., The new min- Zies.E.G...... 420 eralogy. .. 81 Zinkenite group.. 284 Witherite, occurrenceat Stan- Zippeite. 23