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Part of a micro-projection setup used by Professor Peterson of the Soils and Agronomy Department used in studying soil structure. The emulsified soil particles are in the glass container under the microscope. Iowa State College. Ames, Iowa
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Part of a micro-projection setup used by Professor Peterson of the Soils and Agronomy Department used in studying soil structure. The emulsified soil particles are in the glass container under the microscope. Iowa State College. Ames, Iowa

Delano, Jack · 1942-01-01 · photo, print, drawing

From the collection of Library of Congress. Free to download, adapt and use — no permission needed.

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iowasafety film negativesstory countyamesunited states
Credit linePart of a micro-projection setup used by Professor Peterson of the Soils and Agronomy Department used in studying soil structure. The emulsified soil particles are in the glass container under the mic. 1942-01-01. Delano, Jack. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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