This section is from the book "The Potato: A Compilation of Information from Every Available Source", by Eugene H. Grubb, W. S. Guilford. Also available from Amazon: The Potato: A Compilation Of Information From Every Available Source.
The Dowden potato digger, made by the Dow-den Manufacturing Company, Prairie City, Iowa, weighs 1,140 pounds and is drawn by two or four horses, although made strong enough that six may be used, if required.
The point, or "snout," of the digger goes under the rows, elevating the potatoes over an apron made of rods spaced far enough apart to let the dirt fall through, but close enough together to carry the potatoes over and deposit them on the top of the ground.
Dowden Potato Digger at work on Mt. Sopris Farm.
Dowden Potato Digger.