THE ART OF PROJECTING. 



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IN 



PHYSICS, 



CHEMISTRY, AND NATURAL HISTORY 



WITH THK 



PORTE LUMIERE AND MAGIC LANTERN. 



BY PROF. A. E. DOLBEAR, 



TUFT'S COLLEGE. 



ILLUSTRATKD. 



BOSTON : 



LEE & SHEPARD, PUBLISHERS. 



NEW YORK: CHARLES T. DILLINGHAM. 



1877. 





