Shown from the right rear, a self-propelled combine takes down crops in Washington County, Iowa, while simultaneously harvesting the grain in a cloud of dust.
Shown from the right rear, a self-propelled combine takes down crops in Washington County, Iowa, while simultaneously harvesting the grain in a cloud of dust.
This illustration diagrams the destructive distillation of wastes by (Cline) Continuous-Feed Process, Agricultural By-Products Laboratory, Ames, Iowa, September 13, 1934
A group of large cylinders and tubs containing agricultural by-products are in the foreground. One of the cylinders is empty and waiting to be filled. There are towels hanging over the tubs and there is a large tank sitting on a table in the corner…
This stationary cooker installed in the Chemical Engineering Building was used to digest cornstalks for board production. The inscription on the cooker reads ""Max pressure 50 lb. per sq. in, 1-2-37."" Machine is part of project 158.
