735B7304: Two types of wooden strainer for irrigation wells

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Abstract
This negative is of two photographs in this collection, 735Aa0203 and 735Aa0204, taken in 1935. Top image appears in "Construction of Irrigation Wells in Colorado," by W. E. Code, 1935. See Figure 1. Bottom image appears in "Putting Down and Developing Wells for Irrigation" by Carl Rohwer, 1940. See Figure 28.
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undated
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