Of the rectangular or long pile, they consist of the two largest bottom rows and top-row; of the square pile, of two bottom-rows and top shot; and of the triangular pile, of one bottom-row, the shot at the opposite angle, and that at the top. 64. How is the number of shot in a triangular face computed? Multiply the number in the bottom row, plus one, by half the number in the bottom row, for the number required. 65. How is the shot contained in the top row of a rectangular pile calculated? One added to the difference between the long and short bottom rows will be the number required. 66. How is the shot in an incomplete pile calculated? By first computing the number in the pile considered as complete, then the number of what the upper part ought to consist; and the difference of these piles will be the number contained in the frustum or incomplete portion. [Sidenote: 106]] DIAMETERS OF SHOT, SHELLS AND SPHERICAL CASE. ================================================= 13-in.|10-in.|8-in.| 42 | 32 | 24 | 18 | 12 | 6 ------+------+-----+----+----+----+----+----+---- in. | in. | in. | in.| in.| in.| in.| in.| in. 12.87 |9.87 |7.88 |6.84|6.25|5.68|5.17|4.52|3.58 ------+------+-----+----+----+----+----+----+---- WEIGHTS OF SHOT, SHELLS AND SPHERICAL CASE. ==================================================================== |Columbiads| | | and | Mortars. | Guns and Howitzers. |Sea-Coast | | |Howitzers.| | +-----+----+-----+-----+----+----+----+-----+----+----+---- |10-in|8-in|13-in|10-in|8-in| 42 | 32 | 24 | 18 | 12 | 6 +-----+----+-----+-----+----+----+----+-----+----+----+---- | lbs.|lbs.| lbs.| lbs.|lbs.|lbs.|lbs.|lbs. |lbs.|lbs.|lbs. Shot, | 128 |65 | — | — | — |42.7|32.6|24.4 |18.5|12.3|6.1 Shells, | 101 |50.5| 197 | 87.5|44.5|31 |22.5|17 |13.4| 8.4| Spher. | | | | | | | | | | | case, | — |30 | — | — | — |20.3|16 |11.86| 8.7| 6.1|3.06 ---------+-----+----+-----+-----+----+----+----+-----+----+----+---- The 8-inch Mortar Shell is used for the Siege Howitzer. WEIGHT OF CANISTER SHOT.