ADVERTISEMENTS. iii 
AMERICAN MONTHLY 
MICROSCOPICAL JOURNAL 
14TH YEAR, 1893. PRICE INCREASED TO $2.00. 
Beautifully Ilustrated. 
ORIGINAL ARTICLES by the best writers. Descriptions of Microscopical 
Methods, pictures of new apparatus, a department of Medical Microscopy 
revealing what the instrument is doing to combat disease, Bacteriology or 
the study of Bacilli, Diatoms or Nature’s Jewels, Biological Notes upon the 
progress in botany, entomology, agriculture and the study of all life by the 
aid of the grandest of instruments, Recreative Microscopy or the entertain- 
ment of people who exclaim “Oh! My!” when they look through the 
golden tube, Microscopical News, the Detection of Crime, Societies and their 
proceedings, Notices of Books, the Exchange and sale of Slides, etc. 
THE MICROSCOPE 
A Dollar Magazine Devoted Strictly to Elementary Microscopy. 
Price $1.00. 
This periodical, now in its 14th year, recently edited by Dr. A. C. Stokes, of 
Trenton, has been made a magazine for beginners and amateurs and will 
seek to supply every need of those entering upon this fascinating study. 
Its Query DEPARTMENT alone, conducted by Dr. S. G. Shanks, of Albany, 
N. Y., will be found worth the price. 
SAM PiIE COPY FREE sa 
s@~ Price for the two, constituting the only microscopical periodicals in Amer- 
ica, $2.50 per annum. A treatise on elementary microscopy supplied free 
to every new subscriber. 
CARPENTER ON THE MICROSCOPE.—Latest and finest edition $5.00. 
CONSTANTLY ON HAND: 
Beautiful objects mounted in ingenious covers by an English Chemist, and all 
ready for use. Would cost 50 cents each if made in America. Catalogue 
of 170 White’s objects, mostly botanical, and a sample for 10 cents; 20 for 
$1.00. Dr. Stokes says: “ They deserve to be boomed.” Address, 
CHAS. W. SMILEY, 
Wasuineton, D. C. 
