THE ROYAL ARTILLERY INSTITUTION. 
455 
Vertical firing . 
For this the elevating screw is removed and the gnn first laid direct on 
the object and then the breech lowered into a hollow in the centre of the 
carriage giving an elevation of 34° (the carriage having its wheels on). 
Adaption to Draught.—Vide centre of sketch. 
With each gnn is carried a breech lift (which is used under the breech in 
lifting it off the mule), and one shaft in two lengths joined, when required by 
a socket (like a tent pole) and a pin. 
For draught, two guns are made to act the part of gun and limber. 
The first gun forms a limber, the two complete shafts being passed through 
sockets at the extreme end of the breech lift and a ring fixed on the end 
of each shaft like that of the ordinary service off shaft is made to take the 
place of the washer on the axletree arm end. The front ends of shafts rest 
in tugs fixed on the side pieces of the saddle. 
The trail eye rests on the centre of the breech lift and is lashed to it by 
the trail ropes. 
The traces attach the breast harness to two links and washers on the 
axletree arms inside the wheels (one is visible through spokes of wheels on 
centre mule at bottom of sketch), the traces are kept from hanging too low 
by being passed through loops on the breeching and rings on the breech 
lift. 
The second gun is limbered up to the first by means of a strap in the trail 
eye which is buckled through the breast bolt eye of the first gun. 
It is considered that a light field battery might be thus formed, the nine 
mules whose loads have been removed becoming available for mounting men \ 
the Otago saddle when properly made is suitable for riding. 
Ammunition . 
Carried on mules. Projectiles filled, common shell, Boxers shrapnel shelly 
case shot. Cartridges filled, 6 oz .; fuzes, time, Boxer's 10 seconds, 5 seconds 
tubes. 
In reserve,—double shells; cartridges filled; fuzes^ time. Boxer's 15 
seconds. 
Common shell . This as well as the shrapnel and double shells is fitted 
with 6 zinc studs (£ to each groove) attached by undercutting. It is lined 
with red lacquer. Fuze hole, “ common gauge." 
Weight, empty ... 
Bursting charge, L.G. powder ... 
Length of shell .... 
7 oz!”} To * al 7 lbs. 7oz. 
6*8 inches. 
As has been said, these shells are carried filled and plugged, marked 
“ filled" in red paint. 
[VOL; V.] 
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