INDEX TO VOLUME XXIV.* 



Academy, National, meeting at New 

 York. 507. 



Agassiz's Expedition to the Tropical 

 Pacific, reports, 450. 



Alabama, underground water re- 

 sources, Smith, 84. 



Arnold, H. D., electric arc, 383. 



Association, American, meeting at 

 Chicago, 507. 



Astronomical papers, Lehigh Uni- 

 versity, Ogburn, 283. 



— Observatory, Cambridge, 509. 



B 



Bacterial Infections of Digestive 

 Tract, Herter. 91. 



Barker, H. C, thermoelectromo- 

 tive forces of potassium and so- 

 dium, 159. 



Barrell, J. B., geology of Marysville 

 mining district, Montana, 85. 



Barus, C, method for observation 

 of coronas, 277, 376 ; cycles of 

 coronas, 309 ; decay of nuclei, 419 ; 

 volcanic activity, 483. 



Bascom, F., anhydrite twin from 

 Aussee, 487. 



Becker, G. F., current theories of 

 slaty cleavage, 1. 



Benton, J. R., strength and elasticity 

 of spider thread, 75. 



Bermuda Islands, Verrill, 179, 180. 



Biology, Elements, Hunter, 448. 



Birds of the Chicago area, Wood- 

 ruff, 92. 



Blackwelder, E., Research in China, 

 501. 



Bolometer, vacuum, Warburg, Leit- 

 hauser and Johansen, 500. 



Boltwood, B. B., radio-activity of 

 thorium salts, 93 ; new radio-ac- 

 tive element, 370. 



BOTANY. 



Anemonella thalictroides, Holm. 



243. 

 Plant Chemistry, studies in, and 



literary Papers, Michael, 90. 

 Textbook of Botany, Campbell, 91. 

 Brogger, W. C, minerals of South- 

 ern Norway, 282. 



Cady, W. G., electric arc, 383. 



Campbell, D. H., Textbook of Bot- 

 any, 91. 



Canal rays, Paschen, 441. 



Cape Colony, plains in, Schwarz, 

 185. 



Carnegie Institution, publications, 

 87, 382. 



Catalonia, volcanoes and rocks, 

 Washington, 217 ; Calderon, Ca- 

 zurro and Fernandez-Navarro, 282. 



Cathode rays, secondary, Kleeman, 

 499. 



CHEMISTRY. 



Acetamide, preparation, Phelps, 

 429. 



Ammonia, action upon ethyl oxa- 

 late, Phelps, "Weed and Housum, 

 479. 



Atomic weights, speculations in re- 

 gard to, Collins, 496. 



Chromium, new variety, Jasson- 

 neix, 81. 



Copper, determination, Gooch and 

 Heath, 65. 



Fluorides, interference with preci- 

 pitations of alumina, Hinrichsen, 

 79. 



Formamide, preparation, Phelps 

 and Deniing, 173. 



Helium in natural gas, Cody and 

 McFarland, 497. 



Hydrocarbons, decomposition of 

 gaseous, Kusnetzow, 374. 



Ionium, Boltwood, 370. 



Lanthanum, estimation, Drushel, 

 197. 



Manganese, magnetic compounds 

 with boron, etc., Wadekind, 80. 



Molybdic acid, behavior, Randall, 

 313. 



Potassium as the cobalti-nitrite, 

 Drushel, 433. 



aluminium sulphate, Gooch 



and Osborne, 167. 



Radium, atomic weight, Cui'ie, 439. 



Silicon and silicon carbide, com- 

 bustion, Mixter, 130. 



Silver, nitrogen, etc. , atomic weight, 

 Richards and Forbes, 439. 



* This Index contains the general heads, BOTANY, CHEMISTRY (inch chera. physics), GEOLOGY, 

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

 mentioned. 



