DISTRICT OF MASSACHUSETTS, TO WIT. 



District Clerk's Office. 



BE it remembered that on the twenty-ninth day of September, J825, in the 

 fiftieth year of the Independence of the United States of America, Cum- 

 mings, Billiard & Co. of the said district, have deposited in this office the 

 title of a book, the right whereof they claim as proprietors, in the words 

 following, viz : 



" An Elementary Treatise on Mechanics, comprehending the Doctrine of 

 Equilibrium and Motion, as applied to Solids and Fluids, chiefly compiled, 

 and designed for the use of the Students of the University at Cambridge, 

 New England. By John Farrar, Professor of Mathematics and Natural 

 Philosophy." 



In conformity to the act of the Congress of the United States, entitled " An 

 act for the encouragement of learning, by securing the copies of maps, 

 charts, and books, to the authors and proprietors of such copies, during the 

 times therein mentioned ;" and also to an act, entitled, " An act supplementa- 

 ry to an act, entitled, 'An act for the encouragement of learning, by securing 

 the copies of maps, charts, and books, to the authors and proprietors of such 

 copies, during the times therein mentioned,' and extending the benefits 

 thereof to the arts ot designing, engraving, and etching, historical and other 

 prints." 



JNO. W. DAVIS, 

 Clerk of the District of Massachusetts. 



