These instructions are published for information and guidance of personnel responsible for organizational maintenance of the computer, gun direction M18.
The rocking bar sight as a unit is mounted on the left side of the carriage opposite the breech of the howitzer. The general design is that of a hollow quadrant-shaped case, curved surface uppermost, pivoted to a large bracket and moved...
"The following brief history of the steps which have been taken, in this country, to organize a bridge equipage adapted to our service, will sufficiently explain the reasons that have induced the Board to recommend the system described in the...