This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
New books can be quickly and neatly covered to keep them clean by cut- ting a paper large enough to cover the back and sides when the book is closed, allowing 1 in. extra at each end to be turned over the front and back edges, then pasting on corners cut from used envelopes. The paper jacket can be slipped on or off easily when the book is opened, and it will keep a new cover clean while the book is being handled. - Contributed by Dr. John A. Cohalan, Philadelphia.
Ill: Paper Covering Kept in Place with Corners Cut from Old Envelopes and Pasted on the Paper