CONTENTS. 
Page 
Art. XXVI.—Professor Marsh’s Monograph of the Dino- 
1 
ECR ha or eee Ronin Pe lun she ire one ae we 
XXVIII. Et aeonte Rocks and Stratigraphy, with map of the 
Pacenie remon = 09 oo Ds AGA, oa orb ee Pe ee 205 
.XXVIIL—Var taitond of Latitude; by Asapn Hatt,..-- -- 223 
XXIX.—Jurassic Strata of North Aus by C. A. Wuirs, 228 
XX X.—Meteoric Iron from Mexico; by N. T. Lupron,. 232 
XXXI.—Optical iron of Aponaise Curves; bs W. 
LECONTY SIRVENE, Sos cio ee ere 
XXXII PEM surcnsent of Strong Electrical Currents; by J. 
AROWORIOGER, 220000 2 Sea lec a os a os eee 
XXXL —Divisiility of the Archean in the Northwest; by 
a RVING! le Sur ele Lo ie tet 237 
XXXIV UMeisiiatepheal Notes; by W. E. Hippen,...--~- 249 
SCIENTIFIC INTELLIGENCE. 
Chemistry ~~ Physics —Infiuence of Temperature on Spectrum measurements, 
ii me New Method of determining Vapor-pressures, Ramsay and 
— of Perio :: oe e by direct synthesis, WEHSARG: 
ion of ro 
asec ieeuie Certai ain aa "Pat ffins 
257 
Absorption by the Earth’s s Atmosphere, 5. P. LANGLEY : ‘aes Meteorological 
and Physical, A. Guyot 
Geology and Mineralogy. Copper Beara Rocks of Lake Superior, R. D. Inv 
258.— Vertebrata sed ae Tertiary Formations of the West, E. D. Corr Oat 
— to the Fossil Flora of the Western Territories, L. LESQUEREUX, 260,— 
‘A 
: Re 
Annual Report of the State genre of California , H.G. Hayxs: Minerals 
from Middletown, Conn.. W. N. Rice: Chrysoberyl in Maine, N. i. PERRY, 263. 
a and Zoology.—Forests of eg America, C. S. Sargent, 264. 
Catalogue of Canadian Plants: Histoire 
DE € ok 
W. Eicnier, 266.—Origin of Cultivated Plants, A. pe CaNxporLe: Abnormal 
oe pathologic forms of fresh-water shells from the vicinity of Albany, N. Y., 
NEOUS Sages pscohtgaeer —-Memoirs of the National Academy of Sciences, - 
= Godin o 68. Obituary.— Alfred vs coat Robert Alfred Cloyne 
win- Austen, 
