. The "keystone" systems, coats, vests and trousers;. ined in the samemanner as explained for Diagram 32. R to 2 and W to 3 are each 2^4^ inches, or the style. Square down from W and 3 to establish 10 and 12. Establish the end of the roll, also points 20 and 21, according to taste or style. Fold the paper on the crease-line, trace from 20 to 21 and 21 to the end of the roll asexplained for Diagram 34. This will give the shape of the revers and establish 23. Thenshape the gorge from 13 to 23. This establishes 22. Space for the buttonholes. Pivot at 15 and sweep backwards from the eye of each bu
. The "keystone" systems, coats, vests and trousers;. ined in the samemanner as explained for Diagram 32. R to 2 and W to 3 are each 2^4^ inches, or the style. Square down from W and 3 to establish 10 and 12. Establish the end of the roll, also points 20 and 21, according to taste or style. Fold the paper on the crease-line, trace from 20 to 21 and 21 to the end of the roll asexplained for Diagram 34. This will give the shape of the revers and establish 23. Thenshape the gorge from 13 to 23. This establishes 22. Space for the buttonholes. Pivot at 15 and sweep backwards from the eye of each buttonhole, also sweep forwardsand backwards from a point ^4 inch below 10. From 10 to 16 is the same as 10 to 12. Shape the bottom back of 16 as represented. From the center-of-front line R W to the button-line is 3^ inch less than from thecenter-of-front line to the front edge of the forepart. For corpulent forms, all the points on the waist and seat lines, except 3, are obtained inthe same manner as explained for Diagram 33. THE KEYSTONE SYSTEMS 71. DIAGRAM 35. 72 THE KEYSTONE SYSTEMS WHOLE BACKS FOR SACK COATS. Diagram 36. T^RAW the construction line A C and obtain all the points except i as explained for^-^^ Diagram 32. Y to I is 5^ inch. Shape the side seam from 5 through T to i. Cut off a seams width, 4 inch forward of the line A O, and when marking on thematerial lay the center-of-back as represented b3- the heavy line, and even with the fold of thematerial. Diagram 37. A back which has been drafted with a shaped center-back-seam may be changed to awhole back by laying the pattern as first drafted over another piece of paper touching astraight line at the top and at the waist as from A to D. The back below the waist lineis shown in dotted lines. Mark all around above the waist line. Pivot the pattern as at the circled disk midway between D and T and swing the partbelow until the center-of-back touches the straight line as from D to 3, then mark below Tand across the botto
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