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.
A crease for sewing is made by folding the cloth, and pressing the edge until a line is made, which serves to sew on.
A ten-inch strip of bleached or half-bleached cotton cloth. (A more distinct line can be made on the bleached than on the half-bleached cotton cloth.)
Fig. 11. - Showing the position of the hands.