105]
62. How is the number of shots or shells in a pile computed, of whatever form the pile may be?
By multiplying the sum of the three parallel edges, by one-third of the number of balls in a triangular face.
63. What is meant by the three parallel edges of the pile?
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?