24 



Experiments upon Gunpowder. 



In the following experiments, No. loo and No. loi, 

 the bullets were not put down into the bore, but were 

 supported by three wires, which being fastened to the 

 end of the barrel projected beyond it, and confined the 

 bullet in such a situation that its center was in a line 

 with the axis of the bore, and its hinder-part was one 

 twentieth of an inch without or beyond the mouth of 

 the piece. 



In experiment No. 102 the bullet was just stuck 

 into the barrel in such a manner that near one half of 

 it was without the bore. 



All that part of the bullet which lay towards the bore 

 of the piece appeared to be quite flat from the loss of 

 substance it had sustained ; and its surface was full of 

 small indents, which, probably, were occasioned by the 

 unfired grains of powder that impinged against it. 



The following experiments were made with the pen- 

 dulum No. 4. The rest of the apparatus as before. 



