THE EOYAL ARTILLERY INSTITUTION. 
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raised tlie 36 ft. in 50 minutes. The inclination of the sheers at the 
time of taking the weight was 13 ft. 
The guns were mounted in No. 3 Battery by means of the gyn, but 
were moved across the fort slung under two sling wagons, which travelled 
easily on firm ground, but owing to the narrowness of the wheels, sank 
at once in soft ground, when it was found necessary to lay down planks. 
Fort St. Angelo (Plate Y.)—Two of the three guns for this fort were 
raised from No. 1 into No. 2 Battery—a height of 43 ft.—by the same 
means as at Fort Ricasoli. One gun was raised in an hour and a quarter, 
the second in an hour. 
As both guns were brought in at the same embrasure, the first had 
to be removed out of the way before the second was raised. In doing 
this, it had to be lowered about 2 ft. into the work. This was done by 
easing it down from the sill of the embrasure on an inclined plane of 
skids, by means of rollers and a 5-inch gyn tackle, which was secured 
to a 9-inch beam lashed across the sheers about 3 ft. above the feet. 
The second gun was rolled back on to its platform, and both guns 
were then mounted by means of the gyn. 
15-inch and 18-inch single blocks were very much required for 
leading off the falls of the tackles, and as only two 18-inch both-ways 
blocks had been received with the 'heavy gear, wire-strapped blocks 
were obtained from H.M. Dockyard. 
The third gun for St. Angelo (Plate YI.) was taken up through 
the sallyport leading from No. 1 to No. 2 Battery. 
The sallyport, for about two-thirds of its length, is tunnelled in the 
rock, and consists of two flights of steps from 6 ft. 6 ins. to 7 ft. wide, 
which meet about half way up, and are nearly at right angles to one 
another. A flag’ stone 7 ft. square in the angle forms a landing. The 
length of the lower portion was about 60 ft., the incline one in 3’35; 
the upper portion is 100 ft. long, with an inclination of one in 3*5. 
The gun, placed on skids and rollers opposite the gate, was steadied 
by a temporary cradle, formed of two 14 ft. skids, bolted together in 
such a way that it might be taken to pieces as required. 
An iron chain was used as a gun-sling, into which a main and two 
side or preventor tackles were hooked. 
The main tackle consisted of a 6-inch coil of rope, rove through two 
double 18-inch blocks, the standing block being secured to a 20ft. 
skid placed diagonally across the wall at the landing, one end resting 
in a recess, the other butting in a hole cut in the second flight of steps. 
This beam was also secured by a strut against the opposite wall. 
A leading block led the running end of the tackle from the beam to 
a winch at the top of the sallyport. 
The side tackles were 3J-inch rope, rove through double and treble 
blocks, the standing blocks of which were secured to a 13 ft. beam 
placed horizontally a little above the stone in the landing. The falls of 
these tackles were also led to the top of the sallyport, and thence to 
capstans. The rollers, 9 ins. in diameter, were 6 ft. long. 
Skidding was laid down over the steps, and the gun was brought 
up from its position at the entrance of the sallyport to the landing— 
