Book 3 — Safeguarding Contents of Unsealed Envelopes
Reading edition
The gummed flaps on envelopes for first-class mail are generally short, and for sending photographs or second-class matter these short flaps do not stay tucked in. The solution is to lengthen the flap, by pasting on a sheet of paper, using the gum thereon.—G. N. Neary, New York, N. Y.