434 



INDEX. 



GEOLOGY— coH timied. 



Stromatoporoids, Ordoviclan, 



Parke, 355. 

 Syi'ingothyris, Schncliert, 233. 

 Tribes Hill formation, age, Ray- 

 mond, 344. 

 Geology, Economic, Ries, 426. 



— Willis and Salisbury, 354. 



Glass and iron, vacuum-tight seals 

 between, Sand, 413. 



Grating, use in interferometry, 

 Barns, IGI. 



Gregory, H. E., Physical and Com- 

 mercial Geography, 158. 



Gregory, W. K., Orders of Mam- 

 mals, 88. 



H 



Halley's comet, Chambers, 154. 



HaM^kins, A. C., effects of glacia- 

 tion on Cretaceous clays, 350. 



Hayford, J. F., figure of the Eai-th 

 and isostasy, 290. 



Heat of formation of metallic oxides, 

 Mixter, 193. 



Helium, liquefaction, Ounes, 413. 



Hill, J. W., esters of halogen substi- 

 tuted acids, 72. 



Hillebrand, W. F., plumbojarosite, 

 191 ; mosesite, new mineral from 

 Texas, 202. 



Hintze, C, Mineralogie, 89. 



Hobbs, W. H., Theory of earth- 

 quakes, 424. 



Hopkins, C. G., Soil Fertility, 158. 



I 



Ice flood hypothesis, Andrews, 86. 

 Illinois geol. survey, bulletins Nos. 

 13, 14, 85. 



— University of, bulletin, 292. 

 Interferometry, use of grating in, 



Barus, 161. 

 Ionization produced by alpha rays, 

 Wheelock, 233. 



K 



Kayser, Handbuch der Spectro- 

 scopie, 349. 



Keller, A. G., Physical and Commer- 

 cial Geography, 158. 



Keller, O., die antike Tierwelt, 88. 



Knowlton, F. H., Jurassic flora of 

 Oregon, 33. 



Kunz, J., electromagnetic emission 

 theory of light, 313. 



Lacroix, A., Mineralogie de la 

 France, 92 ; les Roches alcalines 

 de Tahiti, 360. 



Langley, R. W., determination of 

 columhiuni and tantalum, 393, 401. 



Lichtbogen als Wechselstromer- 

 zenger, Wagner, 350. 



Light, electromagnetic emission the- 

 ory, Kunz, 313. 



— ozone and ultra-violet, Bahr, 348. 



— sterilization, by ultra-violet, Da- 

 guerre, 414. 



Loomis, F. B., new genus of ''pecca- 

 ries, 381. 



Lull, R. S., Stegosanrus ungulatus 

 Marsh, restoration, 301. 



M 



Maryland Conservation Commission, 

 423. 



— Geol. Survey, vol. viii, 423. ' 



— Weather Service, vol. iii, 480. 



— Pennsylvania boundary, resurvey, 

 422. 



Maryott, C. H., halogens in benzol 



derivatives, 378. 

 Matter, Evolution of Living Pui-po- 



sive, Macnamara. 293. 

 McAdie, A., units in aero-physics, 277. 

 Melting point of platinum, Sosman,3. 

 Meteor Crater, Arizona, Barringer, 



427. 

 Meteorite, Australian, Smith, 264. 



— alloys of, Guertler, 413. 

 Mineralogie, Hintze, 89. 

 Mineralogy of France, Lacroix, 92. 



MINERALS. 



Alaite, Central Asia, 360. Ano- 

 phorite, Baden, 90. Antlerite, 

 311. Atacamite, twin crystals. 

 Chili, 16. 



Barbierite, 358. Beryl, presence of 

 alkalies in, 128. Bityite, Madagas- 

 car, 90. Brochantite, Chili, 24. 

 Brugnatellite, 90. 



Dahllite, 309. 



Gageite, Franklin, N. J., 283. 



Hallerite, 90. Hydrogiobertite, new 

 occurrence, 189. 



Joaquinite, 90. 



Labradorite, Mexico, 151. Ludwig- 

 ite, Montana, 146. 



Minguetite, France, 359. Moses- 

 ite, Texas, new, 202. 



Plancheite, French Congo, 9l. 

 Plumbojarosite, Utah, 191. Pod- 

 olite, 309. 



Risorite, Norway, 91. Rosasite, 

 Sardinia, 91. 



Samsonite, 91. Sapphires, syn- 

 thetic, 271. Stellerite, 359. Stelz- 

 nerite, 311. 



