172 
MINUTES OF PROCEEDINGS OF 
(Fig. I, mm), and consists of a small cylinder of gun metal/ with a projecting 
head, this head being screwed 1 2 3 for the purpose of fixing the detonator into 
the fuze, 
Fig. 1, 
E 
A Body of fuze. 
B A lining of papier-mache. 
C Pressed gunpowder. 
D Pressed fuze composition. 
e Powder channel. 
3? Side-holes. 
G- Escape-holes. 
k Protecting disc of copper and papier-mache. 
M Detonator. 
N Hammer of detonator, 
o Suspending wire of hammer, 
p Securing wire. 
composition. 
The cf detonator ” is hollow, and closed at both ends, with the exception 
of a small fire hole at the bottom. Immediately above this fire hole the 
bottom is recessed and roughed, for the reception of a small patch of 
detonating composition, 3 consisting of 
Potash (Chlorate of) 6 parts by weight. 
Antimony (Sulphide of) 4 5 4 „ „ 
Mercury (Fulminate of) 4 „ „ 
Above this detonating composition is suspended, by means of a fine copper 
wire 6 (Fig. 1 , o), a gun metal hammer (n), cylindrical in form, and fitting the 
interior of the detonator. This hammer has on its lower side a small 
partially-hollowed cylindrical projection, jagged into little teeth ; 6 the teeth 
being thus presented immediately above the detonating composition. 
1 The alloy is Copper 12 lbs., Tin 12 oz., Zinc 4 oz. 
2 With a right-handed screw, 14 threads to the inch. 
3 This composition is mixed and pressed into the recess in a dry state, and a drop of thin shellac 
varnish dropped into it, to render it more impervious to moisture. 
4 Crude antimony. 
5 No. 19 wire gauge. 
6 To make the ignition of the detonating composition more certain. A needle point would not 
answer the purpose as well, as it would be liable to fall into and choke the fire hole. 
