REMINGTON PORTABLE 



^ The most complete portable 

 typewriter. Has complete 

 standard keyboard and other 

 "big machine" features. 



5 Small, light, simple and 

 convenient — ^fits in case only 

 four inches high. 



5 These surpassing features 

 have made it the leading 

 portable typewriter — ^in sales 

 and popularity. 



Price, complete with case, $60 



Remington Typewriter Company 



374 Broadway New York 



Branches and Dealers Everywhere 



A Living Monument to 



AGASSIZ 



A Joy and Benefit to Students 

 and Lovers of Nature 



Please co-operate in the great work of 



THE AGASSIZ ASSOCIATION, Inc. 



Forty-seven years of effective service 

 Science, Education and Humanity 



The Guide to Nature 



Monthly Illustrated Magazine 

 EDWARD F. BIGELOW, Editor 



Subscription, $1.50 per year; single copy, 15 cents; 

 three months' trial, 25 cents 



Please write for particulars 



ARCADIA 



SOUND BEACH CONNECTICUT 



Leitz Petrographical Student 

 Microscopes 



"III-M" 



This simplified and inexpensive stand is in an ideal manner adapted for Student- 

 Laboratory purposes. It embraces the high quality of optical and mechanical 

 workmanship to the same extent as -the more elaborately equipped types of Leitz 

 Petrographical Microscopes. 



Object Stage: Rotating, lo cm in diameter. The periphery of the stage is supplied 



with scale and vernier for correct reading of degrees and fractions. 

 Micrometer Screw: "Ball type" fine adjustment for microscope tube. ' 

 Coarse Adjustment: By rack and pinion. 



Tube Analyzer: With correction lens, to compensate for the difference in focus. 

 "Amici Bertrand" Lens: In permanent mounting, attached to slides (to be used in 



connection with eyepiece III). 

 Objective Clutch Changer: New patented form, objectives remain individually and 



permanently centered. 

 Three Objective Adapters: With individual centering mount. 

 Two Stage Clamps. 

 Illuminating Apparatus: With "Nicol" prism and three-lens condenser, permanently 



attached to polarizer, No. 1504. 



Write for Catalog II-B (F) 



60 East IO^^St 



