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Wesley and Ray Maynard on tractor at Birkby farm, Shenandoah, Iowa, 1950s

Sons of Ed and Eleanor Maynard of Chicago, who were friends of Robert and Evelyn Birkby.

Urbanization

Tractors, 1934

In an outdoor courtyard, a group of men are examining various types of tractors.

Tractors, 1934

In an outdoor courtyard, a group of men are examining various types of tractors.

Tractor pulling disk in cornfield

Tractor and Plowed Field

Tractor and farm equipment, 1928

A tractor is pulling a piece of farm equipment through a partially plowed field.

Tractor and farm equipment, 1928

A tractor is pulling a piece of farm equipment through a partially plowed field.

The President tours flood damaged Iowa

Professor Ernest Muchmore Mervine and Agricultural Engineering Class, 1919.

Professor Mervine and several other individuals work on different types of tractors including; a New Hart Parr tractor, a Rock Island Plow Heider tractor and an Avery Company tractor.

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