DETAILS OF THE FOREGOING TABLE.
FIXTURES IN BOATS FOR BOAT-GUNS.
6. Two eye-bolts on each bow, to receive the hooks of the skid; two cross-pieces, of yellow pine, to bear the carriage, so as to carry the muzzle of the howitzer just above and clear of the gunwale and stem.
One piece of yellow pine scantling, placed lengthwise and amidship, mortised into the rear cross-piece to sustain the carriage in sweeping.
MOVABLE PIECES.
7. Six pivot plates and bolts—one at the stem, one at the stern, one at each bow, and one on each quarter; two light wooden tracks to lay along the thwarts for the wheels of field-carriages and the slide of boat-carriage; one midship wheel-track for the trail of field-carriage; two stout skids, each fitted at one end with two hooks, and connected at the shore end by an iron brace.
The chocks with rollers at the stem and stern posts of launches, are arranged to be removed when the gun is used.
8. Implements for Shifting the Howitzer from Boat to Field-Carriage.
One muzzle-block.
One selvagee strap.
One shifting-spar.
One short iron or wooden bolt, to keep the piece on the right slue.