[February, 1S45. 



The data furnished by the preceding table afford the means of ascertaining 

 the proportion of its carbon volatilized in the distillation of the combustible 

 matter in each kind of coal. 



The calculations prove that of its whole ca;bon-con6tituent, the per centage 

 volatilized, was as follows. 



Cambria county coal 16.767 



Midlothian, new shaft, 

 New Castle, . 

 Clover Hill, . 

 Scotch Cannel, 

 Caseyville, Ky., Cannel, 



29.195 

 15.967 

 16.847 

 24.169 

 22.452 



And that the average, was 20.883 



The identity of results obtained in the averages of the 15th and 18th columns 

 should seem to demonstrate that the heating power of bituminous coals is pro- 

 portionate to the carbon which they severally contain. 



The Monthly Report of the Corresponding Secretary was 

 read and adopted. 



John L. Le Conte, M. D., of New York, and M. Clot Bey, 

 M. D., Surgeon in Chief to the Viceroy of Egypt, were 

 elected Correspondents of the Academy. 



