CON EEANZESS 
Page. 
Art. I.—The Muir Glacier; by G. Freprertck Wrieut___- a 
Il.—Age of Coal found in the region traversed by the Rio 
Grande; by-©. “Al IW aire 2 i ee ee 18 
IIl.—The Viscosity of Steel and its Relations to Temper; by 
C. Barus and V. Srrounan (Concluded) ....2_-.---2. 20 
IV.—The nature and origin of Lithophysz and the lamina- 
tion of acid lavas; by J. be EDDINGS | Ses ae 36 
V.—The latest Volcanic Eruption in Northern California and 
its peculiar Lava; by J. 8. Dinu 2s 2 ee 45 
VIL—The Texture of Massive Rocks; by G. F. Becker __-- 50 
VIL—Fifth mass of Meteoric Iron from Augusta Co., Va.; 
by Ge sPe Kea Ss oe ee ee 58 
Wala: = Note on the origin of Comets; by D. Kanone: 5 oe 
[X.—Bichromate of Soda Cell: : bys. Li HARDING 522 anaes 6] 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics—New universal chemical Spectroscope, Kruss, 67.— 
Decomposition of Glass by Capillary water-layers containing Carbonic acid, 
Bunsen: Properties and Constants of Germanium, WINKL#R, 68.—Distinetion 
between spectral lines of Solar and Terrestrial origi, Cornu: New form of 
Galvanometer, 70.—Metallic deposits formed by electrical discharges: Electric- 
ity arising from the condensation of vapor, 71. 
Geology and Mineralogy.—Charleston Harthquake, 71.—Naturally reduced Iron, 
TYRRELL: Partial Report of the Geology of Western Texas, SHUMARD and BER, 
73.—Washoe Rocks, Becker, 75.—Volcanic Glass changed by heat alone to 
Pumice, 76.—North America in the Ice Period, NewBERRY: Geological map 
of the United States, Hircucock, 77.—Tertiary Fossils, Geological Survey of 
Alabama, 1886, ALDRICH and MryEr: Geological Survey of Alabama, SMITH 
and McCatzey, 78. —Geological Report of New Jersey for 1885, Coox: Fresh- 
water Invertebrates of the N. A. Jurassic. Wurre: Modern Petrography, 
WILLIAMS: Stromeyerite from Mexico, 79.—Sttvenite, alum from Chili: Arti- 
ficial crystallized Silico-carbonate, RAMMELSBERG, 80. 
Botany and Zoology.—Bulletin of the Congress of Botany and Horticulture at 
St. Petersburg. 80.—Minor Botanical Notes, 82.—Bulletin of the American _ 
Museum of Natural History, 83. 
Astronomy and Mathematics.—Argentine General Catalogue: Theory of Magnetic 
Measurements with an Appendix on the method of Least Squares, NIPHER, 84, 
Miscellaneous Scientific Intelligence —Precious Stones in Nature, Art and Literature, 
BurnuAM: Transactions of the Royal Society of Canada: Journal of Morphology, 
84.—Papers of the Berkshire Historical and Scientific Society, 85.  Obdtuary.— 
Isaac LEA. 
