516 



GENERAL INDEX. 



[38 



ROCKS- 



Igneous, of Tasmania, Twelvetrees 

 and Petterd, 6, 511. 



— of Terniscouata Lake, Gregory, 

 io, 14. 



— of Wyoming, Cross, 4, 115. 



— of the Yellowstone, Hagne, 1, 

 445. 



Ijolite, Knusamo, Finland, 10, 249. 

 Itacolumite, accessory elements of, 



Derby, 5, 187. 

 Keratophyre dike near New Haven, 



Ct., Hovey, 3, 287. 

 Kyshtymite and corundnm-syenite, 



of tlie Urals, 8, 81. 

 Latite, Sierra Nevada, Ransome, 5, 



355. 

 Lanrdalite, Brogger, 6, 273. 

 Lava beds at Meriden, Ct., Davis, 



1, 1. 



— flows of the Sierra Nevada, Ran- 

 some, 6, 509. 



Leucite rocks in Wyoming, 4, 

 115. 



Leucitite, Alban Hills, Italy, Wash- 

 ington, 9, 53; Montana, Weed 

 and Pirsson, 2, 143. 



Madupite, W. Cross, 4, 129. ' 



Marble, flow of, under pressure, 

 Adams and Nicolson, 10, 401. 



Metamorphism, Van Hise, 6, 75 ; 

 Clements, 7, 81. 



Mica-peridotites, Bengal, Holland, 

 I, 400. 



Mica-trachyte, Tuscany, Washing- 

 ton, 9, 46. 



Missourite, High wood Mts., Mis- 

 souri, Weed and Pirsson, 2, 

 315. 



Mont Blanc petrography, Duparc 

 and Mrazec, 7, 242. 



Monzonite, Bearpaw Mts., Weed and 

 Pirsson, 1, 355; of Predazzo, 

 Brogger, 1, 399. 



Nephelite-basalt, Montana, Weed 

 and Pirsson, 2, 140. 



Nephelite - syenite, New Jersey, 

 Rausome, 6, 417. 



Norites, Gabbros, etc., of Trans- 

 vaal, Leo Henderson, 7, 317. 



Olivine-melilite-leucite rock, Saba- 

 tini, 7, 399. 



Orendite, Wyoming, W. Cross, 4, 

 123. 



Peridotite, occurrence of corundum 

 with, Pratt, 6, 49. 



Petrography of Boston Basin, White, 

 5, 470. 



Phenocrysts of intrusive igneous 

 rocks, Pirsson, 7, 271. 



Pilandite, Leo Henderson, 7, 318. 



ROCKS— 



Pseudo - leucite - sodalite - tinguaite, 

 Montana, Weed and Pirsson, 2, 

 194. 



Quartz-aluniterock, California, Tur- 

 ner, 5, 424. 



Quartz-amphibole-diorite, Califor- 

 nia, Turner, 5, 421. 



Quartz - inuscovite rock, Belmont, 

 Nevada, Spurr, 10, 351. 



Quartz-syenite, Bearpaw Mts., Weed 

 and Pirsson, 1, 295. 



Quartz - tinguaite - porphyry, Mon- 

 tana, Weed and Turner, 2, 194. 



Rhyolitic lavas of South Mt., Penn- 

 sylvania, Bascom, 3, 160. 



Rockallite, Judd, 7, 241. 



Scapolite rocks, Alaska, Spurr, 10, 

 310. 



Schists of gold and diamond regions, 

 Brazil, Derby, 10, 207. 



Selagite, Tuscany, Washington, 9, 

 46. 



Shonkinite, Bearpaw Mts., Weed 

 and Pirsson, 1 , 360. 



Solvsbergite, Essex Co., Mass., 

 Washington, 6, 176. 



Syenite, Bearpaw Mts., Weed and 

 Pirsson, 1, 352. 



Theralite, Costa Rica, Wolff, 1, 271. 



Tinguaite, Esses Co., Mass., Wash- 

 ington, 6, 176 ; Eakle, 6, 489. 



Tinguaite porphyry, Montana, 

 Weed and Pirsson, 2, 189. 



Trachyte, Bearpaw Mts., Weed and 

 Pirsson, 1, 291 ; 2, 137. 



Trachytes, Ischian, Washington, 1, 

 375 ; Italian, Washington, 8, 286. 



Trap of Rocky Hill, N. J., Phillips, 

 8, 267. 



Vanadium and molybdenum in 

 rocks, Hillebrand, 6, 209. 



Venanzite, Sabatini, 7, 399. 



Wyomingite, W. Cross, 4, 120. 



Yogoite, Bearpaw Mts., Weed and 

 Pirsson, 1, 355. 

 Rogers, A. F., sphalerite crystals 



from Kansas, 9, 134 ; mineralogical 



notes, 9, 364. 

 Rogers, F. J., Deductive Physics, 5, 



148. 

 Rollins, W., regenerating vacuum 



tubes, 7, 159 ; cathode stream, and 



X-light, 10, 382. 

 Romanes, G. J., Essays by, 3, 358. 

 Rbntgen-rays, absorption by air, 7, 



396 ; by chemical compounds, I, 



483. 



— charge of electricity in ions caused 

 by, Thomson, 7, 158. 



— chemical action, Villard, 9, 146. 



