Experiments upon Gtmpowder. 



17 



In order to determine how much of the force of the 

 powder was lost by windage^ and by the "verity oiled 

 leather was fastened round the bullet, so that it now 

 accurately fitted the bore of the piece ; and in the five 

 experiments, from No. 35 to No. 1^^^ inclusive, the 

 valve-vent was made use of. 



Weight of the bullet, together with the leather in 

 which it was enveloped, 603 grains. 



VOL. I. 2 



