This section is from the book "School Needlework. A Course of Study in Sewing designed for use in Schools", by Olive C. Hapgood. Also available from Amazon: School Needlework: A Course Of Study In Sewing Designed For Use In Schools.
1. If the waist measure is less than the bust measure, divide their difference by two, and make a dot this distance on line 7 at each side of line 5; mark them H and I.
2. Draw a straight line from D to H, and another from D to I.
3. Make a dot at the junction of lines 5 and 8; mark it J.
4. Draw a straight line from H to J, and another from I to J.
If the waist measure is greater than the bust measure, slant these lines outward instead of inward, this will necessitate a seam.
Fold the paper under on line J, and cut the pattern on the heavy outside lines.