41J 



VOLUMES XXI-XXX. 



477 



tion of free bromine, etc., 29, 

 338; silver in the determination 

 of molybdenum, etc., 29, 540. 



Perkins, H. A., rectification effect 

 in a vacuum tube, 25, 485. 



Perkins, P. B., molecular weight 

 of radium emanation, 25, 461. 



Pernter, J. M., Meteorologische 

 Optik, 22, 81; 29, 362. 



Perret, F. A., Messina earth- 

 quake, 27, 321; Vesuvius, 28, 



413- 



Petereit, A. H., crystallized native 

 copper, 23, 232; cinnabar crys- 

 tals from China, 26, 517. 



Petrography, see ROCKS. 



Petroleum, genesis, Becker, 28, 



499- 

 Petrology, Hatch, 27, 410. 

 Phelps, I. K., use of succinic acid, 



23, 211; esterification of suc- 

 cinic acid, 23, 368; preparation 

 of formamide, 24, 173; action of 

 dry ammonia, 24, 479; standards 

 in alkalimetry and acidimetry, 

 etc., 26, 138, 143; esters and 

 esterification, 26, 243, 253, 257, 

 264, 267, 275, 281, 290, 296. 



— and M. A., use of zinc chloride, 



24, 194; preparation of aceta- 

 mide, 24, 429; esterification of 

 benzoic acid, 25, 39. 



Phelps, M. A., separation of ar- 

 senic from copper, 22, 488. 



PhiUppi, W., Elektrische Kraft- 

 iibertragung, 21, 81. 



Philippine Islands, Bureau of Sci- 

 ence, Freer, 23, 322; Weather 

 Bureau, Algue, 23, 76. 



— Journal of Science, 21, 336, 

 408. 



Phillips, A. H., gageite, Franklin, 



N. J., 30. 283. 

 Phosphorescence by canal rays, 



Trowbridge, 25, 141. 



— power of positive rays to pro- 

 duce, Kunz, 24, 499. 



Photoelectric fatigue, Allen, 30, 



414. 

 Photographic Exposure Record, 



23, 471. 



— plates, light impressions, Eyk- 

 man and Trivelli, 23, 143. 



Photometric measurements, 

 Tufts, 22, 531. 



Photometry, Liebenthal, 25, 258. 



Phrenology, Spurzheim and El- 

 der, 28, 88. 



Physical Geography, Davis, 26, 

 591- 



— Laboratory, British National, 

 Report for 1909, 30, 82. 



— measurements. Duff and Ewell, 

 27, 488; 30, 350; Sabine, 21, 467. 



— Phenomena, Modern Theory 

 of, Righi, 21, 328; 23, 463. 



Physics, Culler, 28, 557. 



— First Course in, Millikan and 

 Gale, 22, 345. 



— Elementary, Newman, 25, 259. 



— Elements, Crew, 29, 83; Hoad- 

 ley, 27, 339; Nichols and Frank- 

 lin, 27, 85. 



— • General, Crew, 26, 241. 

 — ■ Laboratory, Millikan and Gale, 

 22, 346. 



— New, Poincare, 26, 580. 



— Practical, Franklin, Crawford 

 and MacNutt, 25, 258; Ferry 

 and Jones, 25, 452. 



— - Principles, Gage and Good- 

 speed, 25, 259. 



— • for Schools, Adams, 27, 339. 

 j— Text-Book, Duff, 27, 85; 28, 

 556; Mumper, 25, 259. 



— Theoretical, Planck, 30, 82. 

 Physik, Lehrbuch, Chwolson, 21, 



174- 

 1 Physiologie, Allgemeine, Ver- 

 j worn, 27, 419. 



— Beitrage zur chemischen, Hof- 

 ! meister, 21, ZZ7; 24, 91; 25, 81; 

 I 26, 520. 



Physiology, Hough and Sedg- 

 wick, 24, 448. 



: Pickering, W. H., lunar and 

 Hawaiian features, 23, 228. 



I Pilcomayo River, Lange, 23, 397. 



1 Pirsson, L. V., obituary notice of 



I S. L. Penfield. 22, 353; petrog- 

 raphy of Belknap Mountains, 22, 

 439. 493; geology of Red Hill, 

 N. H., 23, 257, 433; Rocks and 

 Rock Minerals, 26, 403; astro- 

 phyllite in the granite at 

 Quincy, Mass., 29, 215; crustal 

 warping in Ontario, 30, 25; arti- 

 ficial lava-flow and spherulitic 

 crystallization, 30, 97, 425. 

 Plants of Connecticut, 29, 559. 

 — ■ fossil, Seward, 30, 356; see 

 GEOLOGY. 



— Tertiary, see Colorado. 

 Plaster-plaques for museums, 



Goodale, 22, 90. 

 Plate, L., Probleme der Artbild- 

 ung, 25, S3I. 



