Let A B C in Fig. 303 be the part elevation of a pediment, as in a cornice or window cap, over the miter and against the molding and fascia in which a boss, F K G H, is required to be fitted, all as shown by N O E D of the side view.

The outline F K G H of the boss is to be considered as the profile of a molding running in the direction shown by D E in the side view, and mitering against the surface of the cornice shown by N 0 E. For the patterns proceed as follows: Divide so much of the profile of the boss K F H G as comes against the cornice, shown from K to F, into any convenient number of parts, and from these points draw lines parallel to D E - that is, to the direction of the molding under consideration - until they intersect the miter line N O E, which in this case is the profile of the cornice molding. As the boss is so placed over the angle in the cornice molding that the distance from K to F is the same as that from K to G, the part of the boss K G will be an exact duplicate of K F and may be duplicated from the pattern of K F without another side view drawn especially for it, which would have to be done if the boss was otherwise placed. Therefore, extend the line N D upon which to lay off a stretchout of K F H G, dividing the portion K1 F1 into the spaces shown at K F of the. profile, through which draw the usual measuring lines. Make the portion F1 G1 equal in length to the part FUG and, lastly, the portion G1 K2 a duplicate of F1 K1 reversed, as shown. Place the T-square parallel to the stretchout line K1 K2, and. bringing it against the several points in N O, cut corresponding measuring lines, as shown. Then lines traced through these points of in tersection, as shown by K1 L M K2, will be the re quired pattern.

Fig. 303.   The Pattern of a Boss Fitting Over a Miter in a Molding.

Fig. 303. - The Pattern of a Boss Fitting Over a Miter in a Molding.