Cannon for the 4.7-inch units were turned out at the Watervliet Arsenal and the Northwestern Ordnance Co., Madison, Wis. Deliveries from the Watervliet Arsenal began in June, 1918, totaling 120 up to December, while the Northwestern Ordnance Co., starting its deliveries in August, had completed 98 by December.
Up to the 15th of November, 64 complete 4.7-inch units had been floated for our forces overseas.
Forgings for the 4.7-inch gun cannon were made by the Bethlehem Steel Co. and the Heppenstall Forge & Knife Co., of Pittsburgh, Pa.
Owing to the great difference in cross section between muzzle and breech end of the jacket, great difficulty was experienced in the heat treatment of these forgings, particularly on the part of manufacturers who had had no previous experience in the production of gun forgings.
FRONT AND REAR VIEWS OF OUR 4.7-INCH GUN AND CARRIAGE, MODEL 1906, WITH WHICH OUR TROOPS HAVE BEEN EQUIPPED FOR A LONG TIME.
This gun throws a projectile weighing 45 pounds a distance of about 6 miles.
