THE Microsc: PE 
bo 
Or 
Reviews, 
THE WORLD’S OPPORTUNITIES, AND How To USE THEM. By A. 
H. Guernsey, Ph. D. Illustrated. pp. 690. 1884. Hurper nl 
Brothers, New York. 
Mr. Guernsey’s work contains essays on tarms and farming, 
trades, professions, manufactories and fine arts. He has 
brought together a vast mass of facts bearing upon the present 
and future of the country. The author tells us how to avail 
ourselves of the limitless resources of our own country, point- 
ing out clearly that the world’s opportunities lie right here in 
the United States. It will be a standard work of reference in 
regard to all our industrial pursuits, and is full of facts and 
figures. 
The illustrations are unusually good, consisting of engrav- 
ings of famous paintings, and pictures of almost everything in 
the universe. 
The work is sold only by subscription. Address J. R. 
Mattick, Jr., Roxboro, Philadelphia, Pa. 
THE CENTURY. 
The Century will begin with the November number a series 
of articles on the great engagements of the war. The papers 
will be contributed by officers high in command at the time, 
either upon the Union or Confederate side. Gen. Grant, Gen. 
Beauregard, Gen. McClellan, Admiral Porter, and many 
others have already been engaged. Great stress will be laid 
upon the human and heroic aspects of the great conflict. It is 
an important enterprise that the American reader will not be 
slow to appreciate. 
EXCHANGKS. 
(Exchanges are inserted on this page without charge. Subscribers having 
microscopic apparatus for sale or excliange can announce the same without 
charge.) 
WILL exchange good, histological for other first-class mounts. 5S. G. 
SHANKS, M. D., 547 Clinton Avenue, Albany, N. Y. 
A. RICHARDS, of St. Louis, Mich., has for exchange a few mounts of 
e double-stained and single-stained vegetables ; also a number of well- 
mounted injected specimens. : 
