CONTENTS. : vu 
NUMBER CLXXIILI. 
P: 
Arr. XLIV.—Elasticity of Ice; by Joun Trowsrincr and 
mente 0. PACK ale ess ea a a et 349 
XLV.—Digestion Experiinenté by EP. AgMery,...-2 2: 355 
XLVI—Massive Safflo rite ; LeRoy W. McCay,...._-.--- 369 
sais eee of Photogr aphy to Electrical Measure- 
y N TROWBRIDGE an s PEARS) cus 374 
XLVIIr. Eo eodietion of ee currents ; by JOHN 
nd H. V. Hay 3 
cal constitution of alas: i Uo T, SURRMAN, ou. 385 
Li.—Meridional Deflection of Ice-Streams; by W.J. McGeE, 386 
LU Leaps bes Channel of Eagle River; by Cuarizs 
Lewes ates oh ewae souk woe eS eu ya. 392 
LI. serpte of. the Slaty and Arenaceous rocks in the vicinity 
of Schenectady, N. Y.; by S. W. Forp, ....---------- 397 
SCIENTIFIC INTELLIGENCE, 
Chemistry and Physics.—Freezing Point of Saline solutions, Raoutt, 399.—Influ- 
ra of light on Chemical reactions, ScHRAM: Salts formed by Tellurium with 
400. i mpounds of 
aeiage and Moret, 400.—Atomic Weight and ay 
Bann E: Purification of Methyl Alcohol, REGNAULT and VILLEJEAN, 
401. ~Pheo Coloring Matters, BRUNNER and Roser: Abs heen of the Pen- 
dulum the determination of the mean density of the earth, WILstNe, 
402 oie of studying the Electrical Potential of the air, M. PELLAT, 
ag easurement M drostatic t ] 
um Actinometer, M. H. Morié Measurement of Beth Lape of Gravity 
a Naha and Kagoshima, Japan, S. Biicia and E. YaMAa 404,—-A Method 
of Measuring the Absolute Sensitiveness of Pactortapbic, Dry Plates, W. H. 
PICKERING, 405, 
gy and Mi Mineralogy.—Glacial Deposits of Central North America, G. M 
Digaon. 408.—Hle Sa — the Museum of Natural Sciences, Davenport, 
Tow: a, ©. E. Pur rages Suite pid cw Aon gree ADE, F.G.8., 
avd scyare Te anaclies dy di si pl A Reprint ‘Geological 
46 Falcuriion in the High Alps, . 415,—Paleo ontology oer the Eu- 
istri . Wa M. Lory: 
in Northwestern France, ee BRoNGNIART: Geology of Southern Kansas: 
Fauna of the St. John Group, § . F. MarrHews: Mineralogical Notes, G. vom 
Ratu. , 419.—-Bournonite ; - Cuprite H. A. Miers: Lehrbuch der Mineralogie, 
del Estado de Jalisco Led Cartos F. pz LAnDERO: Smaltite from Colorado, 420. 
ce 
the Human Race, A.G. Beth: Prebi As Fishing i in Burope spake N orth mei 
C, Rau : Dictionary of Altitudes in the United States, H. G 
