A treatise on architecture and building construction . cealment, it is impossible to see whether the pinsand mortises fit each other accurately. In preparing the dovetail joint, the pins r. Fig. 8 (c?), aremarked and cut first; the piece c is then laid across the end/, and the mortises o are carefully scribed with a knife-point onthe side of the end of/ The pins must be sawed square fromthe end, or parallel to the edge / t in Fig. 8 (/;), and the mortisesmust be cut square across the end of c/as at /?, the greatestneatness and accuracy being required to insure good §10 JOINERY. 11 15. I
A treatise on architecture and building construction . cealment, it is impossible to see whether the pinsand mortises fit each other accurately. In preparing the dovetail joint, the pins r. Fig. 8 (c?), aremarked and cut first; the piece c is then laid across the end/, and the mortises o are carefully scribed with a knife-point onthe side of the end of/ The pins must be sawed square fromthe end, or parallel to the edge / t in Fig. 8 (/;), and the mortisesmust be cut square across the end of c/as at /?, the greatestneatness and accuracy being required to insure good §10 JOINERY. 11 15. In all joiners work, face and edge marks are madeso as to distinguish the face and edge from which allmeasurements must be taken and all squaring done. At thesame time they serve to assist the joiner in determining theedges that are to be in contact, and prevent mistakes due toputting the pieces together in other than their proper relations. IG. The doAveled joint, shown in Fig. 11, consists ofa plain butt joint between the two pieces c and f, either. Fig. 11. between one end and a side, as at {a), or between the twomeeting edges, as at {b). Holes are bored and dowels areglued and inserted as shown. The object of the dowels is 12 JOINERY. 10 to keep the faces flush, and render the joint stiffer if sub-jected to a transverse strain. The holes should be somewhatdeeper than the length of the dowels, to allow for shrinkageof the material and at the same time insure a close form shown at {a) is a substitute for a mortise-and-tenon joint, but is not to be recommended. 17. The mortise-aiKl-tenoii joint as used in joinery isprecisely the same in principle as the same joint in carpentry butthe fitting is much more accurate. This joint, in varied forms,is used to secure the rails and stiles of doors and windows, tounite the members of heavy machine frames, and to connect thevarious parts of tables, chairs, and other pieces of furniture. 18. Keys and Keying-.—When broad, plain
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