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.
Anyone who has used a sawbuck knows how inconvenient it is to have a stick roll or lift up as the saw blade is pulled back for the next cut. With the supplementary device, shown in the sketch, which can be easily attached to the sawbuck, these troubles will be eliminated. It consists of two crosspieces hinged to the back uprights of the sawbuck and a foot-pressure stirrup fastened to their front ends as shown. Spikes are driven through the crosspieces so that their protruding ends will gouge into the stick of wood being sawed. The stirrup is easily thrown back for laying a piece of wood in the crotch.
Ill: The Holding Attachment Easily Adjusts Itself to the Stick of Wood Placed in the Crotch