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.
An ingenious and simple method of putting up window shelves for winter plants so that the window casing and facing are not marred is shown in the sketch. The materials required are one shelf, about 8 in. wide, 1 1/2yd- of picture wire, two screweyes, two fence staples, and two strips of wood, to raise the shelf slightly from the window sill. The board for the shelf is cut to fit the window frame and casing. The picture wire, screweyes and staples are attached as shown. When cleaning the window the shelf can be drawn out of the way. - Contributed by H. C. Dixon, Johnstown, Pa.
Ill: The Shelf is Hung on Wires Attached to Screweyes Placed in the Facing Edge