BEST BOOKS IIN BOTANY 
Andrews's Practical Course in Botany ......... $1.25 
With brief Flora of the Eastern United States ....... 1 .5o 
With Cowles & Coulter's Spring Flora ........ 1 .50 
Apgar's Trees of the Northern United States .00 
Ornamental Shrubs of the United States ....... 1 .50 
Chapman's Flora of the Southern United States. Third edition. .... 4.00 
Coulter's (J. G.) Plant Life and Plant Uses . 1 .20 
With Cowles & Coulter's Spring Flora ......... 1 .50 
Coulter (J. M.), Barnes & Cowles's Textbook of Botany: 
Volume 1. Morphology 2.00 
The same. Part 1. Morphology . . . . . , . .1.50 
The same. Part 2. Physiology . . . . . . . .1.25 
Volume II. Ecology ............ 2.00 
Coulter (J. M.) & Nelson's New Manual of Rocky Mountain Botany . . . 2.50 
Tourist's edition. Limp leather ......... 3.50 
Cowles & Coulter's (J. G.) Spring Flora . . . . . . . . . .60 
Frye & Rigg's Elementary Flora of the Northwest ....... .72 
The same. With Coulter's Plant Life and Plant Uses ... . . . 1 .60 
Gray's New Manual of Botany. Seventh edition. Illustrated ..... 2.50 
Tourist's edition. Limp leather ......... 3.00 
Leavitt's Outlines of Botany ........... 1 .00 
Payne's Manual of Experimental Botany . . . . . . . . . .75 
I Descriptive Circulars sent on Request | 
AMERICAN BOOK COMPANY 
NEW YORK CINCINNATI CHICAGO 
New Spencer Portable Microscope No. 60 
A full size completely equipped microscope in very 
compact form. 
In metal (magnalium) case — very light. Size of 
case 83^x6y2x33^ in., outside dimensions. 
Weight including case only 91/2 pounds. 
The case carries in addition to the microscope a 
mechanical stage, camera lucida, etc., etc. 
It goes into the case with objectives in position on 
the nosepiece. 
To use the microscope it is only necessary to lift it 
from the case, turn the legs to position and pull 
the draw tube. 
Completely equipped with the usual two eyepieces, 
three objectives including oil immersion, triple 
nose-piece, Abbe condenser, iris diaphragms,' 
quick-screw substage in mahogany cabinet, 
$100.00. 
SPENCER LENS CO. 
BUFFALO, N, Y. 
