TRANSACTIONS 



OF T H B 



AMERICAN 

 PHILOSOPHICAL SOCIETY, 



HELD AT 



PHILADELPHIA, 



FOR PROMOTING 



USEFUL KNOWLEDGE. 



VOLUME IV. 



PHILADELPHIA: 

 Printed and sold by THOMAS DOBSON, at thk 



STONE-HOUSE, NO 4I, SOUTH SECOND STREET. 

 - 1799. 



