STOOL BEDS.
TUBES.
Tubes are of five different natures—viz., Common quill, and Dutch or Paper tubes for exercise, and Detonating quill, and Brass tubes; and Friction tubes for service.
All tubes are gauged to two-tenths of an inch diameter.
The pipes for theQuill tubesare 2½ inches long; and the barrels ofDutch tubesare 1¾ inch in length.[12]
Composition for Common tubes.
Mealed powder, mixed with spirits of wine into a stiff paste.
DETONATING TUBES.
The quills of these tubes are cut to 2¾ inches in length. Small, or pigeon quills, are also prepared for the arms to receive the detonating composition; these are cut to ¾ of an inch in length; and a small hole is bored in the centre to communicate the composition to the body of the tube. The body of the tube is filled precisely in the same way as common tubes.
Composition for the Crosses, or Arms, of Detonating tubes.
Brass tubes,common, are 3 inches long, and the cups, previous to being stamped, are one inch in diameter.
They are filled similarly to common quill tubes.
FRICTION TUBES.
These tubes are of copper, and are three inches in length. The detonating composition is inserted in a tin arm, into which is introducedand pressed down tight, by the sides of the aim, a piece of copper, grooved; with a small ring to receive the cord for firing the tube, and gun.
WADMILTILT.
Length, 14 ft. 6 in. Breadth, 11 ft. 6 in. Weight, 50 lb.
WOODEN BOTTOMS.
They are riveted to shot for brass guns to prevent the bore being indented in front of the seat of the shot by the first impulse of the powder: and to Shells, to keep the fuze in the centre of the bore.