New Blakiston Books On Botany 
GAGER — ^Fundamentals of Botany 
By C. Stuart Gager, Director, Brooklyn Botanic Garden. i2mo, xix+640 pages. 435 Il- 
lustrations. Cloth, $1.50 postpaid. 
GAGER — A Laboratory Guide for General Botany 
By C. Stuart Gager. Adapted for use with any textbook. i2mo, viii+191 pages. Cloth, 
$0.90 postpaid. 
HARSHBERGER— A Textbook of Mycology and Plant Pathology 
By John William Harshberger, Ph.D., Professor of Botany, University of Pennsylvania. 
271 Illustrations. i2mo, xiii+779 pages. Cloth, $3.00 postpaid. 
The knowledge of the science is fully digested and the essential features of all the important 
theories and investigations are stated succinctly. It includes complete and accurate citations from 
the world's literature and many interesting facts from the author's intimate knowledge of the his- 
torical developments of the science in America. He gives first hand many facts that are but little 
known. 
ROBBINS— The Botany of Crop Plants 
A Text and Reference Book by Wilfred W. Robbins, Professor of Botany, Colorado Agri- 
cultural College. With 263 Illustrations and a Glossary. Cloth, I2.00 postpaid. 
In the preparation of the book the needs of non-agricultural as well as agricultural schools 
have been kept in mind because there is a growing tendency wherever botany is taught to tie it up 
more closely with economic interests and to draw more and more upon economic plants in citing 
examples and in choosing objects of study in the laboratory. 
P. Blakiston's Son & Co., Publishers 
1012 Walnut Street Pmi.AOEI.PHIA 
**The Most Important Work That Has Yet Been 
Published on American Mosses" — John Macoun 
Grout's Mosses With liand=Uns and Microscope 
416 pp., 8x1 1 in., 88 full page plates, 265 figures, bound in buckram. Begin- 
ning Dec. 1, 1917, for three months only will be reduced from $7.00 to $5.00 
postpaid, in order to dispose of slightly shelfworn stock. In pamphlet form, 
$4.00. A copy of the Moss Flora of New York City and Vicinity will be 
included with the first ten orders mentioning this advertisement. 
FOR SALE 
One double stereopticon for dissolving views, Darlot lenses, fitted for oxy-hydrogen 
but easily changed to incandescent electricity. A bargain at $25.00 
One Ernemann vest pocket camera f x2f inch with anastigmat lenses, (F6) film pack 
adapter, 6 plateholders and portrait supplementary lens, originally $60.00, now. . $25.00 
One H. C. White Co. No. I Radion Enlarging Printer (scarcely used, cost $15.00) $10.00 
One Remington Typewriter, No. 6, an old style machine, but little used and in good 
condition $10.00 
Address, A. J. GROUT, New Dorp, N. Y. 
Always mention the JOURNAL OF BOTANY when answering our advertisements. 
