ADVERTISEMENTS. 
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| | HAVE for sale fine speci- 
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| Address : 
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OF INTEREST TO ALL STUDENTS AND LOVERS OF NATURE. 
THE OBSERVER 
DEVOTED TO 
All Departments of Nature Studies. 
OUR MOTTO: 
**Keep Your Eyes Open” 
(To observe the wonders and beauties of Nature.) 
@” Official Organ of the Agassiz Association. 
Consists of Three Departments: 
1. The Outdoor World. 2. Agassiz Association. 
Practical Microscopy. 
E. F. BIGELOW, Managing Editor and Publisher, Portland, Conn. 
