152 



Experiments to determine 



TABLE III. 

 Experiments on the Force of Fired Gunpowder. 



It appears, from the foregoing table, that, in the after- 

 noon of the I St of July, the weight (which was a heavy- 

 brass cannon, a 24 pounder, weighing 8081 lbs. avoirdu- 

 pois) was not raised by 12 grains of powder, but that 13 

 grains raised it with an audible though weak report. 

 That, the next morning, July 2d, at 10 o'clock, it was 



