720 



GENERAL INDEX. 



[44 



ROCKS. 



Gabbros and associated rocks 

 at Preston, Conn., Loughlin, 

 34, 306. 



Gneisses of Laurentian high- 

 lands, Canada, Wilson, 36, 

 109. 



Gneissoid structure, in Cort- 

 landt series, Rogers, 31, 125. 



Gold-bearing lode of Passagem, 

 Brazil, Derby, 32, 185. 



Granite, density at high tem- 

 peratures, 37, 22. 



— Quinc}r, and sedimentary 

 formations, Loughlin, 32, 17. 



Granites of Connecticut, Dale 

 and Gregory. 33, 160. 



— etc., of Narragansett basin, 

 Loughlin and Hechinger, 38, 



47- 



— of the southeastern Atlantic 

 states, Watson, 31, 80. 



Granodiorite, Mexican, Bergeat, 



32, 166. 

 Haplobasaltic, etc., magmas, 



Bowen, 40, 161. 

 Hornblendite, Brazil, 38, 79. 

 Igneous Rocks, Daly, 37, 358; 



Finlay, 36, 573; Iddings, 36, 



57i. 

 of the Adirondacks, age 



of, Cushing, 39, 288. 

 natural classification, 



Cross, 32, 77. 

 Ilmenite rocks near St. Ur- 



bain, Quebec, Warren, 33, 263. 

 Kragerite, Norway, 34, 509. 

 Lavas of Hawaii, Cross, 40, 88. 



— from Monte Arci, Sardinia, 

 Washington, 36, 577. 



— See Hawaii. 

 Magmas, crystallization, 



Bowen, 40, 161. 

 Melilite-basalt, Bermuda, 38, 



331. 



Molybdenum in rocks of Ha- 

 waii, Ferguson, 37, 399. 



Monmouthite, Ontario, 40, 424. 



Monte Ferru, trachyte, basalt, 

 etc., Washington, 39, 513. 



Nelsonite, Virginia, 31, 218. 



Nephelite pegmatite, Ontario, 

 40, 418. 



— syenite of Los, Lacroix, 33, 

 68; Ontario, 40, 416. 



Northfieldite, Emerson, 40, 212. 

 Pegmatite and pegmatite schist, 

 Emerson, 40, 212. 



ROCKS. 



Pegmatites, etc., of Narragan- 

 sett Basin, Lahee, 33, 447; 

 pelites, psammites, psephites 

 of, 33, 354. 

 Petrographic classification, 



Cross, 39, 657. 

 Petrography, Sardinian, Wash- 

 ington, 39, 513. 

 — of Tripyramid Mountain, 



N. H., Pirsson, 31, 405. 

 Petrology of the Orijarvi 

 region, Finland, Eskola, 39, 

 221. 

 Pyroxenite, Brazil, 38, 79. 

 Quartzite, Lavras, Brazil, 31, 



482. 

 Rhyolites, trachytes, etc., Sar- 

 dinia, Washington, 36, 577. 

 Rocks of Mt. McKinley region, 

 Alaska, Brooks and Prindle, 

 33, 161. 

 Topsailite, 33, 68. 

 Tuffs, volcanic, microscopical 



character, Pirsson, 40, 191. 

 Urbainite, Quebec, 33, 276. 

 Varnsingite, Sweden, Sobral, 37, 



116. 

 Volcanics, Crowsnest, MacKen- 

 zie, 39, 222. 

 Rockwood, E. W., Chemical 



Analysis, 36, 74. 

 Rogers, A. F., eglestonite, Cali- 

 fornia, 32, 48: baddeleyite, 

 Montana, 33, 54; lorandite, 

 Wyoming, 33, 105; Study of 

 Minerals, 34, 491; delafossite 

 from Bisbee, Arizona, 35, 290; 

 wilkeite and okenite from Cali- 

 fornia. 37, 262; lawsonite, Cal., 

 39, 105. 

 Rogers, G. S., gneissoid structure 

 in the Cortlandt seiies, 31, 125; 

 parting in a coal bed, 37, 299. 

 Rontgen radiation, production of, 



Whiddington, 33, 282. 

 from vapors, Chapman, 31, 



57i. 

 — rays, absorption and wave 



length, Siegbahn, 38, 560. 

 band spectra, Wagner, 40, 



80. 

 crystal structure shown by, 



de Broglie, 37, 277; Bragg, 38, 



481; 39, 678. 

 intensity, Friedrich, 34, 574; 



interference, Friedrich, etc., 35, 



454- 



