Dotted rule.
Brass rule with the face dotted, used for filling up blanks, receipt forms, etc., and to serve is a guide for writing on, thus……………………………………………
Brass rule with the face dotted, used for filling up blanks, receipt forms, etc., and to serve is a guide for writing on, thus……………………………………………
Entry taken from Printers' Vocabulary, by Charles Thomas Jacobi, 1888.