AMERICAN PHILOSOPHICAL SOCIETY. 



THE thanks of the American Philosophical 

 Society are presented to the following persons, for 

 the Communications and Donations affixed to their res- 

 pective names. 



John Vaughan, 

 Librarian. 

 Philadelphia, October \9th, 1804. 



COMMUNICATIONS. 



A Memoir on the Improvement of Agriculture and 

 the Useful Arts. 



By A. Fothergill, M. D. 



An Essay on the Precession of the Equinox, 

 signed Julius, and intended for the Magellanic Pre- 

 mium. 



An Account of his Temporary Rudder. 



By €apt. William Mugford, of Salem, Mass. 



