522 



INDEX. 



Gallium, separation, Brown- 

 ing and Porter, 453. 

 Glass, devitrification, Germann, 



279. 

 Nickel, atomic weights, Baxter 



and Parsons, 365, 

 Perchloric acid in determination 

 of silica, Willard and Coke, 

 207. 

 Salts, decomposition and phase 



rule, Rengade, 364. 

 Silica, determination, Willard 



and Coke, 207. 

 Sulphosalts of lead and copper, 



Foshag, 444. 

 Thoulet's Solution, substitute 

 for, Thiel and Stoll, 279. 

 Chemists Year Book, 1920, Atack. 



88. 

 Child, C. M., Development of the 



Nervous System, 462. 

 Clibbens, D. A., Phase Theory, 281. 

 Climates, Evolution, Schuchert, 



320. 

 Coal in Great Britain, Gibson, 460. 

 Coleman, A. P., Paleobotany and 



the Earth's history, 315. 

 Comey, A. M., Dictionary of Chem- 

 ical Solubilities, 454. 

 Congress, Library, report, 520. 

 Conine, W. H., post-glacial terraces 



of Anticosti Island, 268. 

 Connecticut, Geol. Survey, 286. 

 Copaux, H., Chemistry, 280. 

 Crystal structure of magnesium 



oxide, AVyckoff, 13S. 

 Crystallography, Groth, 515; Jor- 

 dan, 515. 

 Crystals, space groups and struc- 

 ture of. Wyckoff, 127. 

 Cytology, Doncaster, 290. 



D 



Dake, C. J., Rocky Mountain oro- 

 geny. 245. 

 Daly, R. A., post-glacial warping of 



Newfoundland, etc., 381. 

 Decker, C. E., Minor Folds, 373. 

 Devonian Floras, Arber, 514. 

 Dinosaur, Cretaceous armored. 



Lull, 97. 

 Doncaster, L., Cytology, 290. 

 Downing, E. R., Physical Nature 



Study, 91. 

 Dreaper, W. P., Chemical Research, 



208. 

 Drew, G., Zoology, 291. 

 Duparc, L., Platinum Deposits of 



the Ural Mts., 515. 

 Dymes, T. A., Nature-Study of 



Plants, 465. 



Eaton, H. N., Oriskany sandstone 

 faunule, 427. 



Ecker, E. E., Immunology, 518. 



Eddington, Relativity, 457. 



Electric Furnace, Moissan, 367. 



Electricity and Magnetism, Frank- 

 lin and McNutt. 281. 



Embryology of the Chick, Patten, 

 462. 



Entomology, Sanitary, Pierce, 461. 



Explosives, Dictionary, Marshall, 

 89. 



F 



Flight, observations on soaring, 



Hankin, 456. 

 Flora, Glacier Nat. Park, 520. 

 Folds, minor, Decker, 373. 

 Foshag, W. F., sulphosalts of lead 



and copper, 444. 

 Ford, W. E., mineral names, 516. 

 Franklin, W. S., Electricity and 



Magnetism, 281; Mechanics, 281; 



Heat. 367. 

 Eraser River, Canada, calcareous 



sandstone. Johnston, 447; age of 



delta. Johnston. 450. 

 Frye, A. E., Geography, 292. 



Gager, C. S., Evolution in Plants, 



463. 

 Geography, Frye, 292. 

 Geologic Climates, Evolution, 



Schuchert. 320. 



GEOLOGICAL REPORTS. 



Connecticut, bulletins, 286. 

 Illinois. 94, 513- 

 India. 283. 285. 



Great Britain, Memoir, on An- 

 glesey, Greenly, 212. 

 Western Australia, 287. 

 West Virginia, 461. 

 Geologie, Kayser, 213. 



GEOLOGY. 



Bellerophontacea, British Ordo- 



vician, etc.. Reed, 460. 

 Bothriodonts, Troxell, 325. 

 Brachiopoda Triadica, Diener, 



460. 

 Cephalopoda Dibranchiata, v. 



Bi^ilow-Trummer, 460. 

 Climates, Evolution, Schuchert, 



320. 

 Corals, -fossil, from Central 



America, etc., Vaughan, 372. 

 Cormophyta, Origin, Arber, 514. 

 Cretaceous, Upper, Potamogeton, 



Berry, 420. 



