It is true that in Fig. [II] the plumb line as a base for the angle of 15 deg. is outside the body of the seat, but when the coat is on the body, the gores which are cut sidewise cause the back to be turned about 15 deg., running along with the body from the shoulder blades to the hollow of the waist, which is well illustrated in Dia. [I].
Figures and Diagrams.
