INDEX TO VOLUME XX.* 



Academy, National, New Haven 



meeting, 468 ; publications, 469. 

 Aldrich, J. M., catalogue of No. 



American diptera, 77. 

 Allen E. T., thermal properties of 



feldspars, 72. 

 Alpen, die, im Eiszeitalter, Penck 



and Briickner, 407. 

 American Museum Journal, 77. 

 Arizona, petrography of Tucson 



Mts., Guild, 313. 

 Ashley, R. H. estimation of sulphites 



by iodine, 13. 



B 



Bacteriology, Heinemann, 469. 



Bailey, E. H. S., Qualitative Analy- 

 sis, 461. 



Barns, C, groups of efficient nuclei 

 in dust-free air, 297 ; ions and nuclei 

 in dust-free air, 448. 



Baskerville, C, phosphorescence of 

 zinc sulphide, 93; action of radium 

 emanations on minerals, 95. 



Becker, rock cleavage, 407. 



Beiknap Mts., N. H., geology, Pirs- 

 son and Washington, 344. 



Benton, J. R., properties of catgut 

 musical strings, 383, 462. 



Bieres, Fabrication, Moreau and 

 Levy, 168. 



Blondlot's Emission pesante, 400. 



Bolivia, mastodon remains, Pom- 

 peckj, 465. 



Boltwood, B. B., radium and uran- 

 ium in radio-active minerals, 55 ; 

 radio-active waters, Hot Springs, 

 Ark., 128 ; disintegration products 

 of radio-active elements, 253 ; pro- 

 duction of radium from uranium, 

 239. 



BOTANY. 



Croomia pauciflora, Holm, 50. 

 Cyperaceae, studies in the, Holm, 



No. XXIV, 301. 

 Trees of California, Eastwood. 470, 



British Museum, Catalogue of Birds' 

 Eggs, Gates, 412. 



Bronson, H. L., effect of tempera- 

 ture on rate of decay of radium 

 deposit, 60. 



Brown, T. C, Lower Tertiary fauna 

 of Ckappaquiddick Is. , 229. 



Bruckner, E., die Alpen im Eiszeit- 

 alter, 407. 



Bush, K. J. tubicolous annelids from 

 Pacific, 75. 



Cady, H. P., Qualitative Analysis, 



461. 

 Campbell, H. D., Cambro-Ordovi- 



cian limestones of Virginia, 445. 

 Canada geol. survey, 1904, 464. 

 Canadian Rockies, glacial studies, 



Scherzer, 80. 

 | Cape Colony, Geology, Rogers, 163. 

 Carnegie Institution, publications, 



80, 411, 470. 

 ; Carolinas, tin deposits of, Sterritt 



and Pratt, 75. 

 j Cathode, rotating, for estimation 



of cadmium, Flora, 268, 392, 455. 

 Chemical Arithmetic, Wells, 399. 



CHEMISTRY. 



Actinium, gases from, Debierne, 

 319. 



Aluminium, iodometric determin- 

 ation, Moody, 181. 



Bromides, typical hydrous, Kreider, 

 97. 



Cadmium, estimation of, as sul- 

 phate. Flora, 268 ; as chloride, 

 Flora,' 392 ; as oxide, Flora, 457; 

 by rotating cathode, Flora, 455. 



Ferric sulphate solutions, hydroly- 

 sis of, Recoura, 320. 



Gold, separation from platinum 

 metals, Jannasch and von Mayer, 

 320. 



Helium from radium emanation, 

 Himstedt and Meyer, 399. 



Hydrogen, liquid, and air calorim- 

 eters, Dewar, 152 ; nascent, dif- 

 fusion through iron, Winkleman, 

 400. 



Iron, new compound, Hauser, 460. 



* 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. 



