[17] Built for the Marine Corps.
[18] Includes sixteen 8-inch howitzers built for the Marine Corps.
1½-TON ANTIAIRCRAFT MACHINE GUN TRAILER.
TWO VIEWS OF THE 7-INCH NAVY RIFLE MOUNTED ON A PEDESTAL ON A RAILWAY CAR.
This rifle has a range of about 10 miles and throws a projectile weighing 165 pounds. Note the means of loading and the depression angle.