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A micro-projector set up used by Professor Peterson of Soils and Agronomy Department for making a count of aggregates in studying soil structure. On the ruled paper on the right appears an image of soil particles magnified 100 times. Iowa State College, Ames, Iowa

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A micro-projector set up used by Professor Peterson of Soils and Agronomy Department for making a count of aggregates in studying soil structure. On the ruled paper on the right appears an image of soil particles magnified 100 times. Iowa State College, Ames, Iowa

description

Summary

Public domain photograph of college lab, free to use, no copyright restrictions image - Picryl description

date_range

Date

01/01/1942
person

Contributors

Delano, Jack, photographer
place

Location

create

Source

Library of Congress
copyright

Copyright info

No known restrictions. For information, see U.S. Farm Security Administration/Office of War Information Black & White Photographs http://www.loc.gov/rr/print/res/071_fsab.html

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