: CONTENTS. 
Pa 
Arr, XLIX.—The Sufficiency of be ides en for the ) 
Deflection of Streams ; by ts i. Grae. oo ee 427% (| 
‘L—Examination of Wallace’s Modification gi the Physical a 
a heory of Secular Changes of Climate ; by Jas. Crori, 432 if 
LI.—Marsupial from the ed oan Miocene; by W. B. Scorr, 442 
rap 
ibrations of a Tunin -fork: by A. G. Gousvox, ee oe 444 | 
L—Volcanic Rocks of the Great Basin: ; by Arnotp Hacue 1 
ee ee PO ONGe, cree Lk es 453 
V.—Transition from seco 2 Copper-bearing Series to the Pots- 
a dun: re eae. Webern 1 63 
‘ Ly. pm nee of Blectriea Resistance in Terms of Veloc- : 
‘ee oy woe NEE a a ae 465 
y WES Lateral Astronomical Refraction; by J. M. Scwae- 
BERL EM ee ae a Be 466 
aie a from Red Moustain: Cal; by R. GC. Hiris, 472 * 
ence * Convection on Glaciation; by G. F. 
473 
N.S, Riyouxsuns, ...........---- "476 | 
Nao Poy s. sea eae ete 479 | 
rae ese shits, Ma RIGNAC, 482. | ; 
RTH: nba pep ag ee Tar -—— 
of Ca re! HALLER, 
