478 



INDEX. 



Physics, Practical, Millikan and 



Gale, 394- 

 Pirsson, Louis V., obituary notice, 



W. Cross, 173- 

 — Physical Geology, 469. 

 Platinum, in 191 9, 471. 

 Precious stones in 1919, 471- 

 Porto Rico, 1918 Earthquake, 236; 



Scientific Survey, 237. 

 Powers, S., Hawaiian petrology, 



256. 



Radium and uranium, relative ac- 

 tivity, Boltwood and Johnstone, 

 1, 72. 



Reeves, J. R., Anderson esker, 65. 



Relativity, Einstein-Lawson, 465. 



Religion and Science, Woodburne, 

 80. 



Research Council, National, organ- 

 ization, 79; building, 473. 



Righi, Augusto, 466. 



ROCKS. 



Gabbro, Hawaiian, 2JJ. 

 Hommel's Petrography, 75. 

 Hyalo-dacite, 453. 

 Italite, new, 33. 

 Leucite rock, 33. 

 Nephelite rocks, Hawaiian, 274. 

 Obsidian, Lipari, 446. 

 Rhyolites, Lipari, 446. 

 Tertiary intrusives in New Mex- 

 ico, 415. 

 Trachyte, Hawaiian, 268. 



Ruthven, A. G., Animal Biology, 

 76. 



Salt deposition, Grabau, 468. 

 Sayles, aqueo-glacial sediments, 



239- 



Schneider, A., Microbiology of 

 Foods, 172. 



Schuchert, C, Paleozoic crustal 

 instability in No. America, 399. 



Semmes, D. R., Tertiary intrusives 

 of the Pecos Valley, New Mex- 

 ico, 415. 



Shannon, E. V., naumannite in 

 Idaho, 390- 



Shipley, J. W., volcanic emanations, 

 Katmai, Alaska, 141. 



Shull, A. F., Animal Biology, 76. 



Smithsonian Institution, Field 

 Work, 1919, 80. 



— Physical Tables, Fowle, 466. 



Spectrum, solar Einstein-displace- 

 ment, 394. 



Spiritualism, report of Seybert 

 Commission, 81; Truth of, Mrs. 

 D. Humphreys, 81. 



Technical Review, 81. 



Tennessee, geology of Rutherford 



Co., Galloway, 239. 

 Texas, geology, Dumble, 238. 

 Thorpe, M. R., Oligocene (White 



River) Felidse, 207. 

 Triassic and Jurassic in Idaho, 



Mansfield, 53. 

 Troxell, E. L., Entelodonts in the 



Marsh Collection, 243, 361, 431. 



U 

 United States, Bureau of Mines, 



publications, 470. 

 — Geol. Survey, 469. 



Vermont, Mineral Industries, Per- 

 kins et al., 238. 



Violins, mechanically played, Ra- 

 man, 465. 



Virgin Is., Scientific Survey, 237. 



Volcanic emanations, Alaska, Ship- 

 ley, 141. 



W 



Washington, H. S., new leucite 

 rock, 33; rhyolites of Lipari, 446. 



Western Australia, geol. survey, 76. 



Woods, H., Palaeontology, 170. 



Wyckoff, R. W. G., Crystal struc- 

 tures of carbonates of calcite 

 group, 317- 



