The successful embroidery shop : a book that deals with art needlework as a business (1917)
Von Horvath, Guido · Philadelphia : The Von Studio · leaf 173
the scallop, and repeat. The end or middle scallop ought to touch the next crease. The creases serve as a checking system and if there is a slight distance between the last scallop and … when used in con- junction with the scallop marked similarly will produce the size printed on the "center" side. For instance: 36" o 20" means that a 20" center can be made with the 36" scallop. Or 18" o 9" means that a 9" doily with the 18" scallop, etc. LINGERIE, DRESSES AND ALL IRREGULAR SHAPES…
Needlework
Internet Archive · The Library of Congress · Public domain (published before 1931). Free to use for anything.