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.
Where there is but a small quantity of corn to he shelled a shelter can be made of a few scraps of wood usually found on a farm. A block of wood having a sloping notch cut from one end is mounted on three legs as shown. The notched part as well as the lever is thickly filled with spikes driven in so that their heads protrude about 1/2 in. The ear of corn is placed in the notched part and the lever pressed down. Two or three strokes of the lever will remove all the kernels from the cob. A box is provided and conveniently located on one leg to catch the shelled corn. - Contributed by A. S. Thomas, Gordon, Ont.
Ill: The Projecting Nail Heads in the Block and Lever, as They Pass, Shell the Corn