43] 



VOLUMES XXI-XXX. 



539 



Phosphorus oxide, iii, 144. 



valence of, xxx, 483. 

 Photographic dry plates, tests of, ix, 



405. 

 Photographing colored objects in their 



natural shades, viii, 223. 

 Photographs of nebulas, i, 401. 



of spectrum of comet, ii, 134, 163. 

 Photography, in electrical measurements, 



Trowbridge and Hayes, ix, 374. 

 Photometry, nitrogen iodide in, vii, 234. 

 Photophone, Bell, i, 463. 

 Physics, Text-Book of the Elements, 

 Gage,v, 383. 



Text-Book of Principles, Daniell, 

 vii, 487. 



Elementary Text-Book, Anthony and 

 Brackett, ix, 61. 

 Pickering, & C, light of comparison 

 stars for Vesta, viii, 17. 



Observatory Report, i, 166; iii, 161. 

 Annals of Observatory, viii, 319 ; 

 ix, 498. 

 Pickering, W. H., evolution of the trot- 

 ting horse, vi, 378. 

 Pigments, a study of, Nichols, viii, 342. 

 Pinner, A., Organic Chemistry, v, 232 ; 



ix, 255. 

 Piperidine, synthesis of, vii, 406. 

 Planet, new, Peters, vi, 236. 



'Vesta, study of, Harrington, vi, 461. 

 comparison stars for, Pickering, 

 viii, 17. 

 Planets, figures of, ii, 82. 



lists of minor, iii, 249, 334. 

 see also, Mercury, etc. 

 Plants, see Botany and Geology. 

 Platinoid, electrical resistance of, xxx, 



240. 

 Platinum, atomic weight of, i, 398 ; ix, 

 253. 



electrical resistance of, Nichols, ii, 

 363. 



nugget of, Collier, i, 123. 

 Piatt, F, Pennsylvania Geological Re- 

 ports, i, 409; ii, 152. 

 Plowright, C. B., Hetercecism of the 



U reclines, v, 314. 

 Poggendorff, J. C, Dictionary of the 



exact sciences, ii, 245. 

 Pohlman, J., Pterygotus, ii, 234. 

 Polar stations, international, ii, 164. 

 Polariscope, new form of, viii. 456. 

 Polarization, alleged, of sound, i, 501. 

 magnetic rotatory, and chemical 

 composition, iv, 389. 



magnetic rotatory of gases, i, 139. 

 of light of comets, ii. 137, 142, 372. 

 of the corona, Wright, i, 334. 

 oscillation of plane of, by the dis- 

 charge of a battery, iv, 228. 



Polarization, rotation of plane of, by mag- 

 netism, ii, 397, 484; viii, 456; ix, 335. 

 theory of rotation of plane of, iii, 

 148. 

 Popular Science Monthly Index, v, 400. 

 Portugal, geological survey, ix, 417. 

 Potassium chloride, in Absinth, iii, 323. 

 iodide, from seaweed, i, 136. 

 permanganate, iii, 336. 

 Poulsen, V. A.., Botanische Mikrochemie, 



iii, 328. 

 Powell, J. W., plan of United States 

 geological survey, ix, 93. 

 appointed Director of Survey of 

 National Domain, i, 416. 



Introduction to Indian languages, i, 

 166. 



Reports of Bureau of Ethnology, iii, 

 422; ix, 81. 



Reports of U. S. Geological Survey, 

 vii, 64, 66; xxx, 486. 



Contributions to North American 

 Ethnology, xxx, 248. 

 Power, device for measuring, f Brackett, 



vii, 20. 

 Precipitation of Rain and Snow, Schott's 



Tables, iii, 250. 

 Preece, W. H., space protected by light- 

 ning conductor, i, 141. 

 Prehistoric Fishing, Rau, ix, 424. 



Man in Egypt, Dawson, viii, 158. 

 see Geology. 

 Pressure, chemical reactions from, xxx, 

 481. 



soldering by, i, 336. 

 Prime, F., fossils in metamorphic lime- 

 stone in Pennsylvania, vii, 69. 

 Princeton Museum Bulletin, vi, 70. 

 Prinz, W., structure of Diatomacese, vii, 



416. 

 Prisms, carbonbisulphide, .Draper, ix, 269. 

 Pritchett, H. S., ephemeris of satellites 

 of Mars, ii, 485. 



longitude of Morrison Observatory, 

 iii, 77. 

 Prodromus Fauna? Mediterraneae, ix, 76.. 

 Projections, treatise on, Craig, vii, 245. 

 Propane, illuminating power of, xxx, 156. 

 Prout's hypothesis, discussion of, vi, 63, 



236, 310. 

 Prudden, Manual of Histology, ii, 414. 

 Psychical research, American society 



for, ix, 83. 

 Psychrometer, Hazen, xxx, 442. 

 Pterodactyles, see Geology. 

 Publications, distribution of government, 



iv, 481. 

 Pumpelly, R., Maps of the Northern 



Trans-Continental Survey, vii, 246. 

 Putnam, C. E., elephant pipes in the 

 museum at Davenport, Iowa, ix, 411. 



