JUST PUBLISHED 
Elementary Flora of the Northwest 
By THEODORE C. FRYE, Ph.D., Professor of Botany, University of 
Washington, and GEORGE B. RIGGS, A.M., Assistant Professor of 
Botany, University of Washington. Cloth, ]2mo. 256 pages. 72 cents. 
Bound with John G. Coulter's Plant Life and Plant Uses, _ _ _ $1.60 
A field manual of the flowering plants of the ^sTorthwest, which has been 
prepared on account of the great need for such a work in the high schools of 
this section. 
* It comprises descriptions of the native trees, shrubs, herbs, and grasses, 
and some of the cultivated plantH found in Oregon, Idaho, Washiugton, and 
the coastal region of southwestern British Columbia. 
The distinguishing characteristics of a plant are mostly given in the 
keys. In the family and genus descriptions the characteristics needed for 
indentification are briefly listefl, i he geographical distribution given, and the 
derivation of the name is told when known. An important feature is in- 
corporation of numerous facts relating to the practical uses and ecology of 
plants. 
AMERICAN BOOK COMPANY 
NEW YORK 
CINCINNATI 
CHICAGO 
SPENCER MICROSCOPE 
No. 44H 
WITH SIDE-FINE ADJUSTMENT 
(LEVER TYPE.) 
It is built with the regular Spsncer low compact con- 
struction affording ease and comfort in use, black lac- 
quered body tube which avoids reflection of light into the 
eyes, seamless rubber covered stage of large size, upper 
iris diaphragm automatically locked when abbe condenser 
is in place, fine adjustment with a positive stop, all the 
lacquer both black and yellow alcohol proof. Equipped 
with two oculars, triple revolving nosepiece, three object- 
ives, 16 mm. and 4 mm. dry and 1.8 mm. immersion, 
quickscrewsubstage. Abbe condenser with double (hCR 
iris diaphragm complete in Mahogany Cabinet . v ' 
Special terms to Educational Institutions. 
Catalog free on request 
SPENCER LENS COMPANY, = BUFFALO, N. Y. 
