In Fig. 293, let S C K T be the elevation of a vase, the plan of which is a pentagon, as shown O C C2 R P. The elevation must be drawn in such a manner that one of the sides will be shown in prome. Draw the plan in line and in correspondence with it. Divide the profile into spaces of convenient size in the usual manner and number them. Draw the miter lines C1 H1 and C2 H2 in the plan, and, bringing the T-square successively against the points in the profile, drop lines across these miter lines, as shown by the dotted lines in the engraving. Lay off the stretchout M N at right angles to the piece in the plan which corresponds to the side shown in profile in the elevation. Through the points in it draw the usual measuring lines. Place the T-square parallel to the stretchout line, and, bringing it against the several points in the miter lines which were dropped from the elevation upon them, cut the corresponding measuring lines drawn through the stretchout. A line traced through the points thus obtained will describe the pattern. In the case of a complicated profile, or one of many different members, to drop all the points across one section of the plan C1 H1 H2 C2 would result in confusion. Therefore it is customary, in practice, to treat the pattern in sections, describing each of the several pieces of which it is composed independently of the others. In the illustration given the pattern has been divided at the point H, the upper portion being developed from the profile and plan, as above, while the lower part is redrawn in connection with a section of the plan, as shown in Fig. 294. Corresponding letters in each of the views represent the same parts, so that the reader will have no trouble in perceiving just what has been done. Instead of redrawing a portion of the elevation and plan, as has been done in this case, sometimes it is considered best to work from one profile rather than to redraw a portion of it. as that always results in more or less inaccuracy. Therefore, after using the plan and describing a part of the pattern, as shown in the operation explained above, a piece of clean paper is pinned on the hoard, covering this plan and pattern, upon which a duplicate plan is drawn, from which the second section of the pattern is obtained Great care, however, is neces-sary in redrawing portions of the plan to insure accuracy.

Fig. 293.   Pattern for the Upper Part.

Fig. 293. - Pattern for the Upper Part.

Fig. 294.   Pattern for the Base,

Fig. 294. - Pattern for the Base,

The Patterns for a Vase, the Plan of which is a Pentagon.