13] 



VOLUMES XXI-XXX. 



449 



CHEMISTRY. 



Vanadic acid, iodometric esti- 

 mation, Edgar, 27, 174. 



— reduction, Gooch and Edgar, 



25, 233- 



— and niolylidic acid, determi- 

 nation, Edgar, 25, 332. 



Vanadium and arsenic acids, 

 estimation, Edgar, 27, 299. 



— and chromium, estimation. 

 Palmer, 30, 141. 



— as silver vanadate, estima- 

 tion. Browning and Palmer, 

 30, 220. 



Vapor densities, determination, 



Blackman, 26, 400. 

 Weight, change of, in reactions, 



Landolt, 27, 185. 

 Ytterbium, constituents, von 



Welsbach, 27, 83. 

 Zinc, detection of, Bertrand 



and Javillier, 23, 222. 



— chloride, use of, Phelps, 24, 

 194. 



Zirconium, metallic, Weiss and 

 Neumann, 29, 457. 



— and thorium, oxy-sulphides, 

 Hauser, 23, 382. 



Chesneau, M. G., Analytical 



Chemistry, 29, 458. 

 Chicago, birds of, Woodruff, 24, 



92. 

 Chili, copper minerals from Colla- 



hurasi. Ford, 30, 16. 

 China, Cambrian faunas, Walcott, 



22, 188. 

 — Research in, Blackwelder, 24, 



501; Willis, Blackwelder and 



Sargent, 25, 349. 

 Chlorophyll on planets, existence, 



Umow, 27, 487. 

 Chwolson, O. D., Lehrbuch der 



Physik, 21, 174. 

 Cirkel, F., asbestos in Canada, 21, 



255; mica, 21, 405. 

 Civilization, Physical Basis, Heine- 

 man, 26, 241. 

 Clapp, F. G., Cretaceous clay at 



Boston, 23, 183. 

 Clark, A. H., origin of crinoidal 



muscular articulations, 29, 40; 



pentamerous symmetry of cri- 



noidea, 29, 353. 

 Clark, H. L., apodous holo- 



thurians. 26, 100. 

 Clark, W. B., Maryland geologi- 

 cal survey, etc., 30, 423, 430. 



Clarke, F. W., Data of Geochem- 

 istry, 25, 458; Recalculation of 

 Atomic Weights, 30, 80. 



Clarke, J. M., Devonic history of 

 New York, 26, 93. 



Clay-Working Industry in the 

 U. S., Ries and Leighton, 28, 

 563. 



Clays, Ries, 23, 71. 



— and Ceramic Arts, Bibliog- 

 raphy, Branner, 22, 545. 



Cleavage, current theories of 

 slaty, Becker, 24, i. 



Clement, J. K., formation of min- 

 erals of composition MgSiOs, 



22, 385; water in tremolite, 

 etc., 26, loi ; new measure- 

 ments with . gas thermometer, 

 26, 405. 



Clowes, Chemical Analysis, 29, 80. 

 Clute, W. N., Botany, 29, 272. 

 Coal, production in 1908, Parker, 

 28, 500. 



— and coal-mining, geology, Gib- 

 son, 27, 91. 



— in Wyoming, 21, 473. 



Coast Survey, United States, mag- 

 netic reports, 23, 243; 27, 263; 



28, 86. 



— report for 1905, 21, 259; 1906, 



23, 74; 1907, 25, 459; 1908, 27, 

 348; 1909, 29, 559. 



Cockerell, T. D. A., on Tertiary 



insects, 23, 285; 25, 51, 227, 309; 



26, 69; 27, 53, 381; 28, 283. 



— on Tertiary plants, 26, 65, 



537; 28, 447; 29, 76. 

 Cohen, J. B., Organic Chemistry, 



25, 146. 

 Coherer, electrolytic, Gundry, 21, 



326. 

 Coherers, Eccles, 30, 81. 

 Coker, E. G., elastic constants of 



rocks, 22,95; the flow of marble, 



29, 465- 



Cole, G. W., Bermuda Bibliog- 

 raphy, 25, 159. 



Coleman, A. P., Lower Huronian 

 ice age, 23, 187. 



Coleman, Chemical Analysis, 29, 

 80. _ 



Colloidal solutions, electrically 

 prepared, Burton, 21, 399. 



Colorado, Artesian waters. Head- 

 den, 27, 305. 



— Cripple Creek gold deposits, 

 23, 466. 



— Florissant fossil insects, 25, 52, 

 227; 26, 69, 76; 27, 53, 381; 28, 



