CONTENTS OF VOLUME XXXIIL. 
NUMBER CXCIII. 
Page 
Art. l.—The Muir Glacier; by G. FREpERIcK Wriaut.___ 1 
_IL—Age of Coal found in the region traversed by the Rio 
Gr: aude smb © A VW, Hap (Ses le a aria A 18 
iit whe Viscosity of Steel and its Relations to Temper; by 
C. Barus and V. Strounat (Concluded) __-_----_.__- 20 
IV.—The nature and origin of Lithophyse and the lamina- 
tion otacidjlavas): by). Es IpDINGS) eal keene 36 
V.—The latest Volcanic. Eruption in Northern California and 
Lisi peculiar davai by Ji) 9. DIL mi 9s. 2 CoN as Tes as 45 
VI—tThe Texture of Massive Rocks; by G. F. Beckmr___. 50 
VII.—Fifth mass of Meteoric Iron trom Augusta Co., Va.; 
yar s MACON, Oi hee Bee Va No ie A ie Aenea at UUs 58 
VIIL—Note on the origin of Comets; by D. Kirkwoop. Le) 60) 
TX.—Bichromate of Soda Cell; by S. Taping 7 Gi 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics—New universal chemical Spectroscope, Krtss, 67.— 
Decomposition of Glass by Capillary water-layers containing Carbonic acid, 
BUNSEN: Properties and Constants of Germanium, WINKLE&R, 68.—Distinction 
between spectral lines of Solar and Terrestrial origin, 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 BEB, 
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 MrEyER: Geological Survey of Alabama, SMITH 
and McCaLuey, 78.—Geological Report of New Jersey for 1885, Cook: Fresh- 
water Invertebrates of the N. A. Jurassic, WHITE: Modern Petrography, 
WILLIAMS: Stromeyerite from Mexico, 79.—Stiivenite, 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, 
BuRNHAM: Transactions of the Royal Society of Canada: J ournal of Morphology y; 
84.—Papers of the Berkshire Historical and Scientific Society, 85.  Obituary.— 
Isaac Lea. 
