A MEMOIR 



OF 



JOSEPH HEJ^RY. 



A SKETCH or HIS SCIENTIFIC WORK. 



BY 



WILLIAM B. TAYLOE. 



Read before the Philosophical Society of Washington, 



October 26th, 1878. 



PHILADELPHIA: 

 COLLINS, PRINTER, 705 JAYNE STREET. 



1879. 



"-J I p 



