19.

test for silk and cotton, 420. Schönbein, on oxygen, Schott, A., on the Isthmus of Chocó, New Granada, 368.

Schroeder, relation between fermentation and crystallization, 122. Scientific Association at Carlsruhe, 117. Seaweeds, Harvey on American, noticed, 142.

on Blodgettia, Harvey, 144. Shepard, C. U., on Lazulite and Tetradymite in Georgia, 36. Siliciuret of hydrogen, Wohler, 123. Silk and cotton distinguished by means of protoxyd of nickel, 420.

Smith, J. L., artesian well at Louisville, 174. Smith, S., depth of molluscs off Long Island, 281.

Smithsonian Report for 1857, 302.
Solubility of Barytes, 120.

Spontaneous generation, Pouchet, 253; Milne
Edwards, 401; Payen, 405; de Quatrefa-
ges, 406; Claude Bernard, 406; Dumas,
407; J. D. Dana, 403.
Stauroscopic observations of F. von Kobell,
noticed, 388.

lb., on cooled glasses, O. N. Rood, 391.

Varieties, origin of, in plants, 440. Vilmorin, sur l'Amelioration des Plantes, etc., noticed, 440.

Vision, binocular, law of, Dingle, 262.

facts in, Stevelly, 263.

Volcano of Hawaii, eruption in 1859, 410.
W.

Warren's Report of Explorations in Nebraska and Dakota, 378.

map, Pacific R. R. Reports, 380. Water, discovery of composition of, 421. Wetherill, C. M., Artesian well of Lafayette, Ind., 241.

Whitney, J. D., Geology of Iowa, by, noticed,

103.

Whittlesey, C., fluctuations of water level of Green Bay, 305, 446.

Weinland, D. F., animal psychology, 1.

on the tape-worm, 279. Wöhler, siliciuret of hydrogen, 123. Woodbury, D. P., on the Stability of Arches, noticed, 156.

Woody fibre, action of metallic salts, 120. * Wurtz, H., on cobalt and nickel, 25.

on modes of increasing the heat of the blowpipe, 179.

Wyman, J., unusual modes of gestation, 5. Z.

Zoological Museum in Massachusetts, 295, 450.

Zoology, gestation in some fishes and reptiles, Wyman, 5.

depth of molluscs, Long Id., S. Smith, 281.

Crustacea of Mexico, etc., by de Saussure, noticed, 445.

Crustacea of N. Pacific, Stimpson's papers on, noticed, 444.

Melsheimer's Catalogue of N. A. Coleoptera, noticed, 445.

Sacken's Catalogue of N. A. Diptera, noticed, 445.

see further, Fossil.

B

DIAGRAM OF AN ELECTRICAL CLOCK DESIGNED BY PROF FAP BARNARD.