192 
POPULAR SCIENCE REVIEW. 
“ A Dictionary of Physical Science.” Edited by G. F. Rodwell, F.R.A.S., 
F.C.S. London, E. Moxon, 1871. — We do not know why this book was 
not sent to us before, but it is better late than never. At first we were dis- 
posed to underrate it, but now must confess that it is exceedingly well 
done, and is a really admirable dictionary of physical science. W r e have 
only one objection to raise, and that i3 as to the type it is printed with. It 
is infinitely too small. Among the contributors are Mr. Crookes, F.R.S., 
Professor Guthrie, Mr. R. A. Proctor, and Mr. C. Tomlinson. 
w Synopsis of the Acrididae of North America.” By Cyrus Thomas, 
Ph.D. Washington, U.S.A., 1873. — Here is an admirable work in 4to., of 
260 pages, which deals in the fullest manner with the grasshoppers of the 
United States. It is preceded by a description in full of the anatomy of the 
insects, and is followed by an excellent plate and a valuable glossary. The 
.great bulk of the volume includes a description which is full and exact of 
the several species of this group. It is to be followed by other works on 
the botany and zoology of the United States, by equally competent writers. 
We have received the following : — 11 The Philosophy of Voice,” by 
Charles Lunn (London, Balliere, 1874) ; “The Transit of Venus : its Mean- 
ing and Use,” by T.Budd, F.R.S.A. (London, Longmans, 1875) ; “ Professor 
Volkmann on Antiseptic Surgery” (Edinburgh, Oliver & Boyd, 1875); 
il The Patent Question in 1875,” by R. A. Macfie (London, Longmans, 1875) ; 
“ Asiastic Cholera, 1874,” by Surgeon-Major R. Pringle, M.D. (Edinburgh, 
Oliver and Boyd, 1874) ; “ A New Method of Signalling on Railways,” by 
;Sir David Salomans (Southborough, Baldwin, 1874). 
