iv CONTENTS. 
——— sia Intelligence.—Fall of a ss on the 10th of fore hl in 
8. F. 77.—The su Lovee dea rite of Chicago, E. S. B 
Nordenskidl Sw edish Arctic Expeditio: ; Beebe of Etna, 18 —Infiu oa 
f Coal-dust in Colliery Explosions, Ww. GALLOWAY : Elephant Remains of 
f Wishing Oo i 
Roathwe rm part ton Territory: Cudgegong Diamond-field, New 
South Wales, N. Taytor: Re of the New York State Survey for the year 
1878, J. T. G ae —tTransactions of the Big ner Acade f Sciences, 
DAM 
and Letters: Ocean Wonders, W. E. : Paris Academy of Sciences : 
British Associatio on: American Association : Memoir of Joseph Henry, W. B. 
TAYLOR : Observatory on Mt. Etna: Early Man in Britain and His Place in the 
Tertiary Period, 80.— Obituary. —Professor Paolo Volpicelli. 
NUMBER CIV. 
Page 
. XITT.—Te Joe Pig Sass of the North American Ice- ze 
‘Sheet ; by Warren Urn Ss ae 81 
Vv. —Microphotography with “Polles's 8 ae inch ‘Objective ; 
by Ernraim CurTrTer, ae pete. Oe ee 
XVI—Magnetic Strains in Tro ; by Ao: Kamat So 99 
XVIL.—The Loess of the Micsiesipg! Valley, and the AKolian 
Hypothesis; by KE. W. Hugann: .... cocea. -5-5---* 106 
XVIIL—On a Method of swinging Pendulums for the deter- 
ng of Gravity, proposed by M. Faye; by 8. 
112 
XIX. anes SS. of hee woes as ar oo of | Section across 
the Appalachian Chain; by J. L. CAMPBELL, ---------- 119 
XX. hana ery of a supposed new Planetoid ; hy CO. &. 
ct eee ae Rae ner ce cowl oe eee 
XXL Motes on the Laramie Group of Southern Colorado and 
Northern New age. east from the 2 Ranges ; 
by J. J. Stevenson, Beer eee ye L's 
XXII—On some points in 1 Lithology; ‘by James D. Dana, 134 
XXUIL—On the size of Molecules; by N. D. C. Hopess,..- 135 
XXIV.—Discovery of a — poe ot a Rocks 
wee ew ee ee ee eee eee ower ewww eee 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics,—V apor-densities at very High oe V. Meyer 
and 0. ceneue Vapor-densities of Metallic Chlorides, V. and C. MEYER, 140.— 
Lead_tetrachlori ide, Fisoer: New element,. Scandium, 141.—Action of Bleach- 
ing Powder on Ethyl Alcohol, Scumirr and Gotppere: Heptane from Pinus 
Sabiniana THORPE, 142. — Synthesis of Chrysene, GRAEBE and BUNGENER: 
Se . 0. N. Roop, 143.—Color-blindness, B. J. Jerrrigs: Fric- 
tion and. Lubrication; R. 3, Taunaron: Neuere Appara' gel aaneres 
schaflicheSehule und Forachong von n M. T. EpELMANS, 14 
