A. That portion of the gun between the rear of the trunnion-band and the front of the breech. (Fig. 5.)

Q. Define the chase.

A. That portion of the gun between the front of the trunnion-band and the muzzle. (Fig. 5.)

Q. What is a barbette gun?

A. One that fires over a parapet.

Q. What two classes of barbette guns are there?

A. Barbette disappearing and barbette non-disappearing.

Q. What is the center of gravity?

A. That point where, if the gun were pivoted, it would balance. It is always near the trunnions.

Q. What is the difference between front-pintle and center-pintle carriages?