lV CONTENTS. 
Perchlorid of lead, PbCl?, 94.—New solvents for Gold, 95. 
me new facts concerning amalgamation : Chemical 
synthesis, 96.—Acclimation of the Camel in Australia: Ac- 
climation of the Salmon: Spontaneous generation, 97.— 
Mexican Scientific Commission, 98.—Bibliography, 99. 
XIV. On the supposed Tadpole nests, or imprints made by the 
Batrachoides nidificans (Hitchcock), in the red shale of the 
New Red Sandstone of South —— sein . CHARLES 
Upnam SHEPARD, - 99 
XV. On a Theory proposed iy Prasat, ee ona wade of meas- 
uring the average size of — fine inh ~ Professor 
Ocp pEN N, Roop, - : 104 
' 
SCIENTIFIC INTELLIGENCE. 
Chemistry and Physics.—On a new form of magneto-electric machine :. On the synthesis 
of chiorid of thioxy], Wurtz, 107,—On a new series of hydrocarbons, SCHORLEMMER : 
unds of ena Marienac, 108.—On the preparation of iodhydric and 
hosphoric acids, sia KOFER, 109.—On crotonic acid, BuLk: On syntheses of 
guanidin, A. W. Hormann: On flame reactions, Bunsen, 110, 
Mineralogy and Geology.—Geological Survey of Illinois, 110.—Contributions to the Pa- 
leontology of Illinois and other Western States, by F. B. Mex and A. H. WorTHEN, 
sane Notices, by Wm. P. dete 
ny.—The Miscellaneous Botanical Works of Robert Brown, Esq., 125.—Nature of 
Anthers, &c., J. Muetier; An Innovation in Nomenclature in the recently issued 
volume of the Prodromus, 126.—Mémoire sur la Famille des Pipéracées, par M. Cast- 
mir DeECANDOLLE: American Heather, 1 
Astronomy. Observations of Venus near its inferior nahin, 129, 
Miscellaneous Scientific Intelligence—Telegraphic determination of Longitude between 
Europe and America, 130.—Mr. George Peabody’s recent gifts to Science, 131.—Obit- 
uary —George W. Featherstonhaugh, 135. 
Miscellaneous Bibliography.—Geological Map of the Department of the Seine, by Mr. 
Devessz, 135.--The American Naturalist: A Manual of Blowpipe rae and De- 
Ww 136 
eas 
try, by Henry E, Roscoe: Lecture Notes for Chemical Students, etc., by ign 
FRANKLAND, 137.—Chemical Tables, by Steruen P. Suarries, 139.—A new Chem- 
ical Nomenclature, by Prof. S.D. Tintman: Memoirs of the National Academy : No- 
tices of New Works and ings of Societies, 140. 
