478 



GENERAL INDEX. 



[42 



Platinum, melting point, see 

 Metals. 



— occurrence in U. S., 23, 319. 



— specilic heat, White, 28, 334. 

 Platinum-rhodium thermoelement, 



Sosman. 30, i. 



Plimmer, R. H. A., Chemical Con- 

 stitution of Proteins, 27, 271. 



Pogue, J. E., Jr., mineral notes, 

 28, 187: ancient volcanic rocks 

 of No. Carolina, 28, 218. 



Poincare, L., New Physics, 26, 

 380. 



Polarisationsmikroskop, Wein- 

 schenk, 22, 89. 



Polariscope, Rolfe, 21, 174. 



Polarization, absence in artificial 

 fogs, Barus-, 27, 402. 



— Fizeau's research on the 

 change of azimuth, 24, 498. 



Polonium, alpha-rays from, ab- 

 sorption of, Levine, 22, 8; re- 

 tardation, Taylor, 26, 169. 



• — radio-activity, Boltwood, 25, 

 28.S; Curie, 21, 326. 



Positive rays, see Rays. 



Potential in dark cathode space, 

 Westphal, 27, 84. 



Poulton, E. B., Essays on Evolu- 

 tion, 27, 193. 



Pratt, H. S., Vertebrate Geology, 

 22, 190. 



Prescott, C, ilvaite, Cal, 26, 14. 



Pressure, measurement of high, 

 30, 81. 



Prisms, deviation of rays by, 

 Uhler, 27, 223. 



Prosser, C. S., use of name Buena j 

 Vista for a geol. terrain, 21, 181. f 



Proteids, Chemistry of, Mann, 21, 

 407. 



Proteins, Chemical Constitution, j 

 Plimmer, 27, 271. 



— Vegetable. Osborne, 30, 294. t 

 Prouty, W. T., Meso-Silurian de- 

 posits of Maryland, 26, 563. 



Psycho-Biologie, Henry. 28, 88. 

 Punnett, R. C, Mendelism, 24, 

 S08. 



Quartz as geologic thermometer, 

 Wright and Larsen, 27, 421. 



— • formation of. Day and Shep- 

 herd, 22. 27=;. 



— See MINERALS. 



Quebec, metamorphic rocks of St. 

 Francis Valley. Dresser 21, 67. 



i Quebec, glaciation of Orford and 

 Sutton Mis., Wilson, 21, 196. 

 Queensland, volcanic rocks, Jen- 

 sen, 23, 70. 



R 



Rabl, Organhildende Substanzen, 

 23, 468. 



Radiant emission from the spark, 

 new. Wood, 30, 414. 



Radiation from ordinary ma- 

 terials, Campbell, 21, 249. 



— investigations, Coblentz, 27. 

 188. 



Radio-active element, new, Bolt- 

 wood, 24, 370; 25, 365. 



— elements, chemistry, Strom- 

 holm and Svedberg, 27, 404; 

 disintegration products. Bolt- 

 wood, 23, -]"]. 



— Ions, etc., Righi, 23, 463. 



— matter in earth and air, Blanc, 

 23, 385- 



— minerals, lithium in, McCoy, 

 25. 346; radium in, Rutherford 

 and Boltwood. 22, i; Eve, 22, 

 4; Gleditsch, 29, 79. 



— Transformations, Rutherford, 

 23, 64. 



Radio-activity, Becker, Ruther- 

 ford, Levin, 22, 460; Marck- 

 wald, 26, 400; Raffety, 27, 406. 



— and Geology, Joly, 29, 83. 



— alpha-rays, Taylor, 26, 169; 

 Duane, 26, 465; Wheelock, 30, 

 233- 



— ■ atmospheric, Dadourian, 25, 

 33.'^- 



— of lead, McLennan, 25, 147. 



— of polonium, Curie, 21, 326. 



— of potassium salts, Henriot 

 and Vavon, 28, 409. 



— of radium salts, Boltwood. 21, 

 409. 



— standard of, Duane, 26, 521; 

 the Curie. 30, 416. 



— of thorium. Ashman, 27, 65; 

 Dadourian, 21, 427; of thorium 

 minerals and salts, Boltwood, 

 21, 415; 24, 93. 



— of uranium minerals, Bolt- 

 wood, 25, 269. 



— velocity of a-particles, retarda- 

 tion of, Rutherford, 21, 399. 



— - see Radium. 



Radiochemistry, Cameron, 30, 82. 



Radiology ancl electricity, Inter- 

 national Congress, 29, 92; 30, 

 415- 



