with a wooden head en- closed in an indented cylinder, closed by a cap; the head has a recess for the composition, and another for cement for the conducting wires. The Abel fuse, h, consists of a wooden head, into which the insulated conducting wires enter, and are covered with a tin foil cap… … cant filn, for filing inside angles of 120°; t, when parallel, is a banking or watch pinion file, when taper, a knife edge file, s is a screw head, feather edge, or slitting file; w, a valve file; X, triangular-and-half-round file; y, double or checker- Mi ing file for gunsmiths; z, double or…
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