THE ROYAL ARTILLERY INSTITUTION. 
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of a brass washer ( cc )/ countersunk into the lower side of the top of the fuze; 
a drop of shellac varnish being deposited in each hole to exclude moisture. 
In the centre of the group of holes is fixed a small steel point ( d ) which 
projects into the fuze about one-tentli of an inch. 1 2 The body is open at its 
lower end, and tapped 3 for the reception of the bottom. 
About half-way down the body, and on opposite sides, two small holes are 
drilled, and tapped 4 for the reception of the suspending pins. 
The upper part of the body projects slightly, 5 forming a rim or shoulder 
round the top of the fuze, which prevents it from being placed topsy-turvy 
into the shell. 
The Bottom (fie) is a stout disc 6 of the same alloy as the body, into which 
it screws, 7 forming, as its name implies, the bottom of the fuze. It is 
provided with a small fire-hole (f) in the centre, closed on the lower side by 
a brass disc, 8 and driven and pierced above this disc like a tube. On either 
side of the fire-hole are two small wrench or key holes. 
The Powder pellet is a cylinder of the same alloy as the body, equal in 
diameter to the interior of the body, but shorter. The upper part of the 
pellet is recessed for the reception of a boxwood detonator; the lower part 
is hollowed out, driven and pierced like a tube, a central fire-hole being made 
through the intervening metal, communicating from the detonator to the 
tube. Two horizontal holes are drilled into the opposite sides of the pellet 
for the suspending pins; and two (nearly) vertical holes are provided on 
either side of the detonator to assist in the passage of the flame from the 
time fuze. 9 
The Detonator (h) is a hollow boxwood cylinder which fits into the recess 
made for its reception in the pellet, and is filled with the same detonating 
composition as Armstrong's E pattern time fuze, viz. 
1 Brass-plate *015 in. thick.— Specification. 
2 “The projection of the needle is not to exceed *1, nor to be less than ’08 of an inch.”— Ibid. 
3 With a right-handed thread of 26 to the inch.— Ibid. 
4 With a right-handed thread of 36 to the inch.— Ibid. 
6 The projection of this rim is about five hundredths of an inch; the dimensions laid down in the 
Specification being—Diameter of rim, high 1*11 inches, low 1*10 inches.— Ibid. 
6 The thickness of the bottom is *12 inches. Its diameter, high *854 inches, low ’850 inches.— Ibid. 
7 With a right-handed screw 36 threads to the inch.— Ibid. 
8 Brass plate ’015 inch thick.— Ibid. 
9 These holes do not appear in the drawing, being in a vertical plane at right angles to that in 
which the suspending pins, through which the section is taken, are situated. 
