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.
To provide a bench with seats, or shelves, which cannot easily be taken away unless the table is brought along, hinged brackets are attached to stationary crosspieces, which are fastened on the extended end braces of the table. When in use, the brackets are turned down, thereby providing a rigid support for anything that may be put on them. If it is desirable to have the brackets out of the way, as when carrying the bench, it is only necessary to fold them up. - Contributed by J. M. Kane, Doylestown, Pa.
Ill: Bench, or Table, with a Seat on Each Side That can Be Folded for Carrying Purposes