the squareness of work and at the same time the levelness of a head, it being for this purpose sometimes more useful than a spirit level.
Fig. 19.—Donkey's-ear Shooting Block.
Fig. 20.—Donkey's-ear Block for Shooting Wide Surfaces.
Fig. 21.—Mitre Template.
Fig. 22.—Spirit Level.
Fig. 23.—Plumb Rule.
Fig. 24.—Plumb Square.
Tools for Supporting and Holding Work.
Benches.—The ordinary joiner's bench should not be less than about 8 ft. long, 2 ft. 6 in. to 3 ft. high, and 2 ft. 6 in. wide, and should be fitted with wood or iron bench screws so as to accommodate one or two workers. Of course, the height of the bench will be influenced by the stature of the worker and by the kind of work to be done. A joiner's bench of the usual pattern is shown by Fig. 25. It is 12 ft. long, by 2 ft. 6 in. wide, and 3 ft. high. The legs are 4 in. by 4 in.; bearers and rails, 4 in. by 3 in.; sides, 1¼ in. by 9 in.; top, 1½ in. by 9 in. The bench top is mortised at A to
