65. Describe the chassis.
It consists simply of two rails 3 in. apart, and joined by four transoms and assembling-bolts. Hurters on the rear ends of the rails only are used, as the bottom projection of the front transom prevents the carriage running too far into battery. The front end of the chassis rests on the sole of the embrasure. The end is provided with a pintle-plate and a strap of half-in. iron through which the pintle passes to the masonry beneath. The rear of the chassis is supported by an iron prop, the lower end of which is attached to two traverse-wheels.
66. What kind of carriages have been recommended for use in garrisons, instead of wooden ones?
Wrought iron carriages, for all except the flank-casemate; all made in a similar manner, differing only in weight and dimensions.
67. What is the objection to cast-iron?
Its weight, and its great liability to splinter when struck by shot.
68. Of how many parts is this wrought iron carriage composed?
Like the wooden ones, of a gun-carriage and chassis.
69. Describe the gun-carriage.
It consists of two cheeks of thick sheet-iron, each one of which is strengthened by three flanged iron plates bolted to the cheeks. Along the bottom of each cheek, an iron shoe is fixed with the end bent upwards.