INDEX TO VOLUME XVIII / 



Africa, German Southwest, Geology, 

 Voit, 319. 



Air radiation, Hutchins and Pearson, 

 277. 



Alaska, Glaciers and glaciation, Gil- 

 bert, 159. 



Algebra, Hull, 244 ; Tanner, 244. 



Ames, J. S., General Physics, 465. 



Anticosti, geology of, Schinitt, 471. 



Arizona, geology of. Bisbee Quadran- 

 gle, Ransonie, 237 ; Globe Copper 

 District, 157. 



— minerals from, Lindgren and Hille- 

 brand, 448. 



Arkansas zinc and lead deposits, 

 Adams and Ulrich, 394, 470. 



Association, British, meeting at Cam 

 bridge, 320. 



B 



Bahamas, medusa? of, Mayer, 161. 



Barrell, J., recent studies of the 

 moon, 314. 



Baskerville, C, kunzite, 25. 



Beecher, C. E., new Permian Xipho- 

 suran from Kansas, 23. 



Biological Variation, Statistical Meth- 

 ods, Davenport, 401. 



Blondlot, R., X-rays and N-rays, 84. 



Bolton, H. C, Bibliography of Chem- 

 istry, 474. 



Boltwood, B. B., ratio of radium to 

 uranium in minerals, 97 ; r/adio- 

 activity of natural waters, 378. 



BOTANY. 



Algge, British Freshwater, G. S. 



West. 472. 

 Cyperaceee, studies in, No. XXII, 



Holm, 12; No. XXIII, 301. 

 Desmidiaeeas, British, W. West and 



G. S. West, 473. 

 Orchidete, root structure of North 



American, Holm, 197. 

 Roots, electrotropism of, Plowman, 



145, 228. 

 Boynton, W. P., Applications of 



Kinetic Theory, 86. 

 British Museum, list of meteorites, 

 Fletcher, 398. 



Bronson, H. L., transverse vibra- 

 tions of helical springs, 59. 



Bumstead, H. A., atmospheric radio- 

 activity, 1. 



California, San Louis folio, Fair- 

 banks, 238. 



Campbell, M. R., Latrobe folio, 

 Penn, 394. 



Canada, explorations of James Bay, 

 Dowling. 469. 



— Geol. Survey, report for 1903, 239. 

 Cathode, rotating, use of, Medway, 



56, 180. 



— rays, velocity in passing through 

 metallic layers, Hertz and Leit- 

 hauser, 464. 



Chalmers, R., origin of shore lines 

 of St. Lawrence valley, 175. 



Chant, C. A., reception by wires of 

 electric waves, 403. 



Chemie derEiweisskorper, Cohnheim, 

 83. 



Chemistry, Analytical, Vol. IT, Tread- 

 well, 82. 



— Bibliography of, Bolton, 474. 



— Physical Laboratory Exercises, 

 Getman, 82. 



CHEMISTRY. 



Ammonia, conversion into nitrites, 

 Traube and Biltz, 461. 



Anhydride, nitrous, Wittorff, 309. 



Auto-oxydation, Engler and Weiss- 

 berg, 474. 



Barium bromide, precipitation by 

 hydrobromic acid, Thorne, 441. 



Beryllium, atomic weight, Parsons, 

 304. 



Chloric acid, determination, Hen- 

 drixson, 308. 



Chlorides, detection in presence of 

 bromides, Jones, 81. 



Cinnabar, radio-active, Losanitsch, 

 462. 



Double salts, determination by 

 solubility, Foote and Bristol, 309. 



Emanium, Giesel, 81. 



Helium and Hydrogen, condensa- 

 tion by charcoal, Dewar, 390. 



* This Index contains the general heads, Botany, Chemistry (incl. chem. physics), Geology, 

 Minerals, Obituary, Rocks, Zoology, and under each the titles of Articles referring thereto are 

 mentioned. 



