------------------------+------+------------------------------------------ | 1917 | 1918 Caliber. +------+------+------+------+------+------+------- | Dec. | Jan. | Feb. | Mar. | Apr. | May. | June. ------------------------+------+------+------+------+------+------+------- 75-millimeter | 4 | 13 | 73 | 62 | 79 | 239 | 376 3-inch antiaircraft | | | 6 | 7 | 5 | 4 | 12 4.7-inch gun | | | 9 | 10 | 8 | 28 | 155-millimeter howitzer | 2 | 13 | 26 | 61 | 44 | 146 | 133 155-millimeter gun | | | | | 1 | 15 | 4 8-inch howitzer | | | | 34 | 38 | 8 | 240-millimeter howitzer | | | | | | | +------+------+------+------+------+------+------- Total | 6 | 26 | 114 | 174 | 175 | 440 | 525 ========================+======+======+======+======+======+======+======= | 1918 | Caliber. +------+------+------+------+------+------| Total | July.| Aug. | Sept.| Oct. | Nov. | Dec. | ------------------------+------+------+------+------+------+------+------- 75-millimeter | 574 | 678 | 754 |1,385 | 674 | 310 | 5,221 3-inch antiaircraft | 10 | 6 | 49 | 163 | 124 | 18 | 404 4.7-inch gun | 70 | 100 | 84 | 35 | 25 | 53 | 422 155-millimeter howitzer | 176 | 204 | 273 | 279 | 276 | 62 | 1,695 155-millimeter gun | 42 | 28 | 56 | 105 | 79 | 24 | 354 8-inch howitzer | | 28 | 22 | 33 | 14 | 14 | 191 240-millimeter howitzer | | 30 | 21 | 31 | 22 | 49 | 153 +------+------+------+------+------+------+------- Total | 872 |1,074 |1,259 |2,031 |1,214 | 530 | 8,440 ------------------------+------+------+------+------+------+------+------- Our chain of gun factories, that were making this remarkable production, were built as follows: One at the Watertown Arsenal, Watertown, Mass., near Boston, for the manufacture of rough machined gun forgings of the larger mobile calibers. This factory was entirely built and equipped on Government land with Government money and is splendidly able to produce rough machined gun forgings of the highest quality at the rate of two sets a day for the 155-millimeter G. P. F. rifles, and one set a day of the 240-millimeter howitzers.