CONTENTS OF VOLUME XL. 
NUMBER CXVIII. 
° * ‘ Page. 
Art. I. On the Deep Placers of the South and Middle Yuba, 
Nevada county, California, in connection with the Middle 
Yuba and Eureka Lake Canal Companies; by B. Sinuiman, = 1 
II. On the Ice in Kennebec River; by Rev. Freperic Garpner, 20 
lil. On the Origin and Formation of Prairies ; by L. LesquErevx, 238 
IV. Preliminary notice of a small collection of Fossils found by © 
Dr. Hays, on the west shore of Kennedy Channel, at the 
highest northern localities ever explored; by P. B. Meex, 31 
V. On the Replacement of one Alcoholic Radical by another in 
compounds of the Ether Class; 2 C. Frizpet and J. M. 
Crafts, - 34 
VI. On Etherification ; : ‘ C. vine i J. M. re - 40 
VIf. Contributions to the ee of Natural ag a by 
T. Sterry Hunt, - - 43 
VIIL On Molecular Physics ; + Prof W. A. Nei: - ee | 
IX. On the Spectra of some of the Fixed Stars; by Wittiam 
Hueéins, and Prof. W. A. Mitter: and On the ae of 
some of the Nebule ; by Wittiam Hueeins, - 
X. Reactions of Gelatine; by M. Carey Lea, - oO. 
XI. Influence of Gravity on Magnetic asim cee by Pane 
-Earte Cuase,~ - - . ‘ 2-8 
XIl. Researches on the Volatile Hydrocarbons; by C. M. Wikis, 89 
XIII. On the nature of the Invisible “ited a sae ide pd 
M. Carey Lea, - 
XIV. Mineralogical Notices ; yt Prof, c. ‘U. eeueideg: te 
