vi CONTENTS, 
NUMBER CLXXII. 
Page 
Arr. XXXV.—Use of Carbon bisulphide in prisms; being P 
an account of Experiments made by the late Dr. 
Ces DEAPEe OF Néw York. 6. s ei wee be 269 
XXXVI.—The Genus Pyrgulifera ‘Meck, and its Associates 
and Conugeners: by ©. A. Warm) oo ssn oo, 277 
XXXVII—Oceurrencé of Native Mercury 3 in the Alluvium 
in Loubiana 5 by Mo Wiikinsom, 00050 ooree is 280 
XXXVIIL —Earthquakes i in Spain; by ©. G. Rock woop, Jr. 282 
XXXIX. Paar Spores ; by J. M. CL ARMM oa vy ce oe 284 
XL.—Denudation of the two ’ Americas ; by T. M. Reaps,-- 290 
XLI. aie Titer _— Periods; by 7 ROM ost Scie. 300 
XLIT.—Notes on some apparently undescribed forms of 
Fresh. csi ftaiela: No. 2; by A.C. Sroxrs. With 
Bate LE oe a ee ee a ee 313 
XLII. —Paleozoic Notes; New Genus of Cambrian Trilo- 
bites, Meaonacts,; by C.D. WaLcottces so 205 ioe 5 328 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics.—Specific Heat of the Elements at High Temperatures, 
and Ricker, 334.—Conduction of Electricity in rarefied air, K>DLUND: Measure- 
ment @ Rotation of plane of polarizati = of liquids in a magnetic field, Lzo 
: Some Physical Properties of Ice, C. TRorrer, 335.—Photographing 
the Sher Corona, C. Ray Woops: ieee. and Dynamo-Electrie Machines, 
IGGS, 336 
Geology and Mineralogy.—Professor W. O. Crosby on the origin and relation . 
psi a and ocean basins, 336.—Geology of Bermuda, W. N. Rice: C. 
m the Deer Creek Coal-field in Arizona, 338.—Crinoids with pera 
lating Spine, G. J. Hinpe: Creation of Continents by the Ocean Current 
GRIM nm i 
Map of the Dominion of Canada hap grones colored from surveys made by the 
gen orps, 1842 to 1882, A. R. C. Seuwyn: New Minerals from Colorado, 
LLEBRAND, 340.—Colemanite, the new borate of lime, 341.— Koninckite, 
a bk hydrated phosphate of iron, M. CesAro: Analysis of Titanic a en d 
from Brazil, J. B. Macxkinrosn, 342. —Mineralogical Notes, E. Cia 
Minerals from Middletown, Conn., 343. 
ern becag Pee lide of the Fauna and Flora of New Zealand, F. W. 
Hur 3 
Misetancos Site Intelligence. —Part II, Vol. VII of the Transactions of the 
smologi ociety of Japan Pon oceedings of the Colorado Scientific Society, 
oor y the waters of the Hudson River together with an analysis of 
the same, C. F. CHANDLER: life of James Clerk Maxwell, L. meric 347, 
Obituary. —John aers Jeffreys, 347.—Searles Valentine Wood, Jr 
