FAEM IMPLEMENTS, 



PRINCIPLES OF THEIR CONSTRUCTION AND USE; 



ELE^IENTARY AND FAMILIAR TREATISE 



ON MECHANICS, 



AND ON NATURAL PHILOSOPHY GENERALLY, AS APPLIED 



TO THE ORDINARY PRACTICES OF 



AGRICULTURE. 



WITH 200 ENGRAVED ILLUSTRATIONS. 



BY JOHN J. THOMAS. 



" We should like to see this work printed, bound, and hung up in every work- 

 shop, tool-room, and farmer's book-shelf in the country. It gives the reason and 

 explains the action of mechanical powers, and the forces of nature generally, with 

 illustrations so directly drawn from the farmer's daOy routine, that it gives a direct 

 meaning and value to every point, rarely found in text-books." — Downing's Review 

 of the First Edition. 



NEW YORK: 



HARPER & BROTHERS, PUBLISHERS, 

 82 BEEKMAN STREET. 



1854. 



