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Professor Johnson and three students investigating water hydrant fixtures, 1957
Professor Howard Johnson helps one student adjust a water hydrant fixture, while two others observe in a lab class about sprinkler irrigation equipment.
Engineering student adjusting a surveyor's transit, 1957
Agricultural engineering student Roderick Hall adjusts the surveyor's transit one step in the engineering control of soil and water resources.
Three students working on a project in the Hydraulics Lab, 1957
Three students work on a project in the Hydraulics Lab.
Professor Johnson discussing sprinkler irrigation equipment with students, 1957
Professor Howard Johnson (in tie) discusses the design and operations of sprinkler irrigation equipment with agricultural engineering students in lab class.
Crops pouring from the chute of the combine into a wagon, 1955
Crops pour from the chute of the combine into a wagon, with the farmer sitting on the combine in Washington County, Iowa.
Farmer with wagon of crops harvested by the combine, 1955
A farmer stands next to the crops deposited in the wagon by the combine, with the Washington County, Iowa farm visible in the background.
Combine unloading crops into a wagon, rear close-up view, 1955
In Washington County, Iowa, a combine unloads crops into a wagon pulled by a tractor, in a rear close-up view.
Farmer unloading crops from combine to wagon, 1955
A farmer watches his combine unload crops into the adjacent wagon pulled by a tractor, in Washington County, Iowa.
Farmer submerging his hands in freshly combined crops, 1955
A farmer showcases the product from a self-propelled combine, in this case either corn or soybeans, in Washington County, Iowa.
Self-propelled combine harvesting crops, in front close-up, 1955
A farmer operates a self-propelled combine to harvest crops in Washington County, Iowa, shown in front close-up.