APPARATUS FOE 



XXXV. — Explanation of an Apparatus, sug« 

 gested by Colonel Yule, for Discharging Ord- 

 nance upon Mr Forsyth's Plan; and an Ac- 

 count of some Experiments performed with it. 



Bp Mr John Deuchak, Lecturer on Chemistry. 

 (Read 16th December 



It is proposed, in the present paper, first to explain 

 an apparatus some time ago suggested by Colonel 

 Yule, for applying Mr Forsyth's plan to the dis- 

 charging ordnance, without either the use of a light, 

 or the usual prime ; and, secondly, to give a very 

 brief account of several experiments which I have 

 performed with it, 



I. The apparatus has first to be noticed. — This is 

 very simple. It consists of a thick brass tube, (Plate 

 XXIV, fig. 1. A B), fifteen inches long, which is 

 meant to represent the touch-hole of the gun. The 

 diameter of the bore of this tube, (as is shewn in 

 jig. 6.) is about the 18th or 20th part of an inch. 



