INDEX TO VOLUME XXIII. 



Academy, National, meeting at 

 Washington, 395. 



Adams, J. M., spectrum and absorp- 

 tion of Rontgen rays, 91 ; trans- 

 mission of Eontgen rays, 375. 



Africa, alkaline rocks of eastern, 

 Arsandaux, 230. 



Air, periodicity of ionization, Wood 

 and Campbell, 224. 



Alaska, Pliocene climate at Nome, 

 Dall, 457. 



— coal resources, Collier, 314. 



Amaduzzi, ionization and electric 

 conductivity, 463. 



Association, American, meeting at 

 New York City, 76. 



Atmosphere, ionization, of ocean, 

 Eve, 224. 



Australia, geol. survey of Western, 

 Maitland. 463. 464. 



B 



Barus, C, changes of colloidal nucle- 

 ation, 202 ; vapor nucleation in the 

 lapse of time, 342 ; decay of ions in 

 fog chamber, 460. 



Bergen, J. Y., Botany, 155. 



Boggild, Greenland minerals, 320 ; 

 sea-floor deposits of Greenland, 394. 



Boltwood, B. B., disintegration 

 products of uranium, 77. 



Botany, Bergen and Davis, 155. 



— Paleozoic, Scott, 235. 



BOTANY, PALEOBOTANY. 



Algue Oxfordienne, Lignier, 240. 

 Aneimites, seeds of, White, 237. 

 Araucarieae, Seward and Ford, 236. 

 Brillenkaimane von Brasilien, Sie- 



benrock, 240. 

 Clathropteris meniscoides, Na- 



thorst, 239. 

 Cycadofilices, White, 237. 

 Cyperacese, studies in, Holm, 422. 

 Dictyophyllum and Camptopteris, 



Nathorst, 238. 



Flora, Cretaceous of New York 

 and New England, Hollick, 233 ; 

 Lower Cretaceous, of Quedlin- 

 burg, Richter, 238 ; Ehsetic, of 

 Persia, Zeiller, 236. 

 Florule Portlandienne, Pliche and 



Zeiller, 236. 

 Lepidostrobus f oliaceus, Scott, 



240. 

 Lignite of Vermont, Tertiary, Per- 

 kins, 237. 

 Microsporangia of PteridospermeEe, 



Kidston, 238. 

 Paleobotany of Long Island, Hol- 

 lick, 236. 

 Plants, influence of climate on struc- 

 ture, Holtermann, 469. 

 Seed, The, a chapter in Evolution. 



Oliver, 235. 

 Sigillaria elegans, Kidston, 240. 

 Sinnesorgane im Pflanzenreich, 



Haberlandt, 154. 

 Stauropteris oldbamia, germinating 



spores, Scott, 239. 

 Sutcliffia insignis, Scott, 237. 

 Tubicaulis sutclimi, Stopes, 240. 

 Brazil, facetted pebbles of, Lisboa, 



9, 150. 

 — Geol. survey, 308. 

 British Museum, publications, 321. 

 Brooklyn Institute, Bulletin, 76, 399. 

 Brown, T. C, development of 



Streptelasma rectum, 277. 

 Browning, P. E., separation of 

 magnesium, 293 ; detection of fer- 

 rocyanides, etc., 448. 

 Building stones, of North Carolina, 



Watson and Laney, 70. 

 Bumstead, H. A., scientific papers 



of J. Willard Gibbs, 144. 

 Bush, K. J., tubicolous annelids, 52, 

 131. 



Canada geol. survey, 306. 

 Canfield, F. A., mineralogical notes, 



20. 

 Cape of Good Hope geol. reports, 



308, 465. 



* 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. 



