TRACTS, 



MATHEMATICAL AND PHYSICAL. 



BY 



HENEY LORD BROUGHAM, LL.D., F.R.S., 



CHANCELLOR OF THE UNIVERSITY OF EDINBURGH ; 



MEMBER OF THE NATIONAL INSTITUTE OP FRANCE; AND THE ROYAL ACADEMY OF NAPLES. 



anb 



EICHAKD GKIFFIN AND COMPANY. 

 1860. 



