Miscellaneous Bibliography. 295 
3. A Treatise on Astronomy, Spherical and Physical, with Astronom- 
ical Problems, and Solar, Lunar, and other Astronomical tables, for the 
more extended descriptions of astronomical facts, and an 
4, Elements of Chemistry, Theoretical and Practical 3 by WittraM 
M.D., LL.D., Treas. and V. President Roy. Soc., V. P. 
science in the republication of the excellent work on Chemistry by Prof. 
i one in the English language. Profes 
iller has combined in his treatise the practical with the theoretical in a 
Way that renders it useful and popular beyond the limits of the ordinary 
chemical class and lecture room. The volume is handsomely printed, 
and well illustrated. ee ee 
: opular Treatise on Gems in reference to their scientific value, 
@ guide for the teacher of Natural Sciences, the Lapidary, Jeweller, and 
teur, dc. ; by Dr. L. Fevcnrwancer. 3d’edit., 504 pp., 12mo. 
New York, 1867.—Dr. Feuchtwanger’s treatise on gems is a popular 
Work, containing much information of interest to science, the jeweller’s 
art, and the wearers of jewels. It is illustrated by numerous plates, 
0.—This volum 
Melville Gillis of the Washington Observatory, by B. A. Gould; a 
of panjamin Silliman, by A. Caswell; and a third, not unexceptionable, 
it . Lesley. : 
1. Memoirs of the Boston Society of Natural History, shoes I, Part 
of the Colymbus torquatus, with notes on its myology, with a plate; B 
173, Zaclogteal relations of the first-discovered traces of Fossil 
n 
ptera,  . 
Scuppzr.—p. 193, On the parallelism between the different stages 0 
in the individual and those in the entire group of the 
* 
