534 



INDEX. 



Pendulums for gravity measurements, 

 use of planes and knife-edges in, 

 Mendenhall, 144. 



Penfield, S. L., Cookeite from Maine, 393 ; 

 mineralogical notes, 396; Pentlandite, 

 Ontario, Canada, 493. 



Philosophical Society, American, 527. 



Phinney, J. L., barium sulphate in analy- 

 sis, 468. 



Phosphorescent rays, penetration of thin 

 metallic screens, Lenard, 435. 



Photographic study of the movement of 

 projectiles, Neesen, 253. 



Photography, color, Lippman, 68. 



Physics. Atkinson-Ganot, 436. 

 Hall and Bergen, 255. 

 Practical, Barrett and Brown, 524. 

 Glazebrook and Shaw, 436. 



Pirsson, L. V., datolite, Ont., 100 ; vol- 

 canic rocks from Gough's Island, S. 

 A., 380. 



Poole Brothers' Celestial Handbook, 528. 



" Potential," a Bernoulhan term, Becker, 

 97. 



Preston, E. D., gravity determinations 

 at the Hawaiian Islands. 256. 



Projectiles, motion studied by photogra- 

 phy, Neesen, 253. 



Pupin. M. I., electrical oscillations of 

 low frequency and their resonance, 

 325, 420, 503. 



a 



Quincke, magnetic and electrical instru- 

 ments, 254. 



R 



Refraction of light on snow, Whitney, 

 389. 



of liquids, index of, Ruoss, 434. 

 Reyer, E., experiments in physical geol- 

 ogy, 164. 

 Rock-cutting and grinding machine, 



Williams, 102. 

 Rocks— 

 Andesites, etc., of Equador, Below- 



sky, 75. 

 Basalt and trachyte from Gough's 



Island, S. A., Pirsson, 380. 

 Elseolite-syenite from Hamburg, N. J., 



Kemp, 298. 

 Granites, Argentine, Romberg, 441. 

 Igneous rocks of Mexico, Cross, 119. 

 Nepheline rocks m Brazil, Derby, 74. 

 Phonolite, Great Britain, 441. 

 Sodalite-syenite and other rocks from 

 Montana, Lindgren and Melville, 

 286. 

 Rosenbusch, H. von, Mikroskopische 

 Physiographie. etc . 3d ed., 75. 



Russia, Mineralogy of , Kokscharow, 525. 

 Nikitin on the Quaternary deposits 

 of, Wright, 459. 



s 



Saville-Kent, W., Barrier Reef of Aus- 

 tralia, 362. 



Scheele, Carl Wilhelm, Letters of, 434. 



Schreiner's Spectral-Analyse der Ges- 

 tirne, 358. 



Schumann, K., Morphologische Studien. 

 167. 



Scotland, geol. map, Geikie, 74. 



Selby, A. L., Mechanics of Solids and 

 Fluids, 528. 



Seward, A. C, fossil plants as tests of 

 climate, 438. 



Shaler, N. S., origin and nature of soils, 

 163. 



Shaw, W. N., Practical Physics, 436. 



Smith, E. A., geol. survey of Alabama, 

 163 ; underthrust folds and faults, 

 305. 



Snow, B. W., infra red spectra of alkali 

 metals, 68. 



Snow, refraction of light upon, Whit- 

 ney, 389. 



Soils, origin and nature of, Shaler, 163. 



Sound and Music, Zahm, 69. 



Specific heat of liquid ammonia, Lude- 

 king and Starr, 200. 



Spectra of the alkali metals, infra red, 

 Snow, 68. 



Spencer, J., Theoretical Mechanics, 255. 



Squier, G. 0., electro-chemical effects 

 due to magnetism, 443. 



Squinabol, X, flora tertiaria Italica, 438. 



Starr, J. E., specific heat of liquid am- 

 monia, 200. 



Stars, distance of, by Doppler's prin- 

 ciple, Colles, 259. 



Stas, Jean-Servais, 442. 



Tesla's experiment, simplification of, 523. 



Texas Academy of Science, Transac- 

 tions, vol. 1, 78. 



Time, estimates of geologic, King, 1 ; 

 Upham, 209; Fisher. 464. 



Trowbridge, J., Phvsical abstracts, 68, 

 158, 253, 349, 434, 523. 



IT 



Ulrich, E. O., the Bryozoa of the Lower 



Silurian in Minnesota, 440. 

 Upham, W., ice age as one glacial epoch, 



70 ; estimates of geologic time, 209. 



