The man above is Carleton Robie, a contractor here in New Hampshire. He was one of many enthusiasts who showed up for an antique engine show last weekend in Dunstable, MA.
These engines were used on farms and other places to power equipment. Power was often transferred by belt as you see here to run sawmills and other devices.
Mr. Robe brought a grinder with him that he used to turn kernals of corn into corn meal.