CONTENTS. — Vv 
NUMBER CLXXI. 
Page 
Art. XXVI.—Professor Marsh’s Monograph of the Dino- " 
175 
MPM ee eng oe ee ke hs ck ba owe Oe 
XXVII.—Taconic Rocks and is yey ane with map of the 
#aoontc region ; "Uy J. DP, DAN‘. ce 205 
XXVIIU.—Variations of eas. : : Asarn FLsid, 043 223 
XX1X.—Jurassic Strata of North America; by C. A. Wurrn, 228 
XX X.—Meteoric Iron from Mexico; by N. T. Lupron,.... 232 
XX XI.—Optical Sal bigpae of ‘Acowstis Curves; by W. 
LeConte STEVENS 
AE, ee sc ai 
XXXII. —Measurement of Strong Electrical Currents; by J. 
DROWBEUIDGE, oa 5 45 65 -ao na cee as see 236 
XX XIII. —Divisibility of the Archean in the Northwest; by 
Tie IRVING, 39. in acetic ee ee ene 237 
XXXIV. —Mineralogical Notes;- by W. E. Hippen, 249 
SCIENTIFIC INTELLIGENCE. 
eraser ai Physics.—Influence of Temperature on Spectrum measurements, 
Kru 1.— New Method of determining Vapor-pressures, a and 
Youre} n-forma to) 
Atomie Weight of Platinum, HALBERSTAD?, poe es n of havaniess 
oxychloride, senna Certain new Paraffins, SoRABsI, _— Derwanves of 
Urea, BEHREND i n the Pe Chem mt Mur: : Introduc- 
tion : the St aay of Organic Chemistry, A. PINNER: Elements of Chemistry, 
m of Daniell Cell, HeELMuoLTz, 257.—Researches on Salar Hea ae 
‘Anace pias by the Ear th’s — 8. P. LANGLEY: Tables, Meteorologies! 
and Physical, A. ae 
Geology and Miner _Ouaenadias Rocks of Lake Superior, R. TRVING, 
258 jubsrstrorontes of the Tertiary Formations of the West, E. D. Cop : Contri- 
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Ann as Weree oi of the State princi 7 of California a, H.G. KS: Minerals 
rai Middletown, Conn., W. N. Rice: Chrysoberyl in Maine, N. ‘I. PERRY, 263. 
Botany and Zoology.—Forests o Sob h America, C. S. seer 264.—Ma ise 
Catalogue of Canadian Plants: Histoire des Sanaied « des s Savants, ete., 
DE CANDOLLE, 265.—Jah rbuch des K6niglichen poucienes Gartens, ete., A. 
ve EIcHier, 266.—Origin of Cultiva lants, A. DE CANDOLLE: Abnormal 
pathologic — of fresh-water shells rob the vicinity of Albany, N. Y., 
C. EI BEECHER, 2 
a aie Intigence. —Memoirs of the National Academy of Sciences, 
—Watts Fund, 268. Obitwary.—Alfred Taylor: Robert Alfred sei 
aon kan, 268. 
