For the main turret, which is to be movable, a hole is bored in the hull exactly in the middle. In boring, a bit a little larger than the size of a 1-1/2" No. 8 flat-head screw is used, in order that the screw shank will move easily. This hole is countersunk on the under side. A smaller hole is started on the under side of the turret to receive the screw and, when the pieces are assembled, the screw is not screwed up tight, but enough play is left so that the turret will revolve fairly easily.
The Monitor and the Merrimac and Animal Toys.
The two "guns" may be cut from 5/8" dowels, 2-3/8" long, or may be turned on a lathe. Two holes are bored, on opposite sides of the turret, 3/8" deep, to receive the guns which are glued in.
The two pieces to which the wheels are attached are made 1/2" × 3/4" × 4", and are secured in place 4" from bow and stern with shingle nails and glue.
Plate 19.
The four wheels are cut from 1" dowels, 7/8" thick.