v1 CONTENTS. 
ican Lakes considered as Chronometers of Post-glacial time, EpmMunD ANDREWS, 
64.—Fossils in the Mineral veins of the Carboniferous Limestone of Great 
Britain, C. Moors, 265.—Additional note on Elasmosaurus, E. D. Corr, 268.— 
Lias and Oolite of Australia, C. Moorr: Plants of the Coal formation of spa 
] 
Haute-Loi me B. GErnitz, 269.—Sivatherium in Colorado: Megalonyx Jeffer- 
: Mineralogical Contributions of G. vo 1: Laxman f 
Nordenskiéld, a6 —Pho ae Wolframite: Namaqualite, a new ore 
per: Contributions e Mineralogy of Victoria, G. H. 8. Uuricu, 271. 
—On Sellaite, a new atid fluorid, Dr. SrRUvER: Ambrosite, C. a4 nee 
On the Guanape Island Guano and its minerals, C. U. SHEPARD, 273. 
Botan Zoology.—Miscellaneous Botanical Notices and Observations, 274.— 
Carbolizing Birds, H. W. PARKER, 283.—A Synopsis of the Peni Unionide, 
AC Lea, 284.—Commensalism among Animals, VAN BENEDEN, 
Astronomy.—Discovery of a new Asteroid, the 111th, Dr. C. H. F. Peters, 285. 
Miscellaneous Scientific Intelligéence—Nineteenth Meeting of the American Associa- 
io for the Advancement of Science, held in Troy, N. Y., August 17-25, 1870, 
6.—On “ Pure Scarlet,” Wm. H. Datu, 291 diag aia Marsh’s Rocky Moun- 
nite Expedition; Discovery eg: the Mauvaises Terres formation in Colorado, 
Marsu: Glaciers of Scotland, CRoLL, 292.—Meteoric ‘ind? Fall of a Meteorite in 
Stewart Co., Georgia, J. LawRENCE Switu: Prof. Hetmuoutz, Prof. J. Watson: 
occurrence of a Peat bed beneath deposits of Drift in Southwestern Ohio, 
Professor EpwaRp Orton: Woodward on the Magnesium and Electric Lights 
for Photo-microg 29 ituary.—JacoB P. Giraup, JR., 293.—Mr. A. H. 
Hauipay, 294. 
Miscellaneous Bibliography.—The Andes and the Amazon, or across the Continent 
South America, JamMES OrTON: The Chemical History of the Six Days of 
Creation, Joun Putin, 294.—The American Chemist, a Monthly Journal of The- 
oretical, Analytical and Technical Chemistry, edited by C. F. and W. H. 
CHANDLER: On the Gulf Stream, and the Thermometric knowledge of the At- 
lantic Ocean and adjoining lands in the year 1870, Dr. A. PETERMANN: poimre 
of Gold and Silver Ores, and extraction of their respective metals withou 
quicksilver, G. KusteL, 295.—Reports, etc., 296. 
NUMBER CL. 
Arr. XXVIII—On the examination of the Bessemer Flame 
with Colored Glasses and with the Spectroscope; by 
J. M. Sixx IMAN, 297 
XXIX—On a simple method of measuring Electrical Con- 
| ductivities by means of two equal and opposed magneto- 
currents or waves; by Atrrep M. Mayer,__.. 307 
XXX.—On the supposed absence of the Northern Drift from 
the Pacific — of the Rocky Mountains; by Rozerr 
Brown, 318 
