48£ APPARATUS FOR DISCHARGING ORDNANCE. 



using, 2, 3, 4, and sometimes even 5 grains at onck 

 After all of the trials, I found a brownish scorched 

 mark in the centre of the flannel, about the size of 

 the hole of the tube. 



A variety of experiments were also performed, 

 with flannel, paper, and other substances, placed be- 

 tween the joinings ; in all which cases it was found, 

 that the flame had been forced through, generally 

 leaving a hole in the substance used, and a pale- 

 coloured flame was observed to dart to a consider- 

 able distance below the bottom (B) of the tube. 



In a future paper, I hope to have the honour of 

 laying before the Society a fuller account of these 

 curious experiments. In that paper, I propose to 

 enter upon the cause of the results which present 

 themselves ; and to notice more fully the nature of 

 the flame whilst in rapid motion, the alteration of 

 effect upon substances, by retarding its movement, 

 and the canse of its apparent inaction upon the 

 gunpowder. 



