Public domain
Forest Products Laboratory, Madison, Wisconsin. Testing a block of wood to show the effect of compression parallel to the grain. As pressure is applied to the block, a lamb's roller extensometer is used to plot the effect on a graph
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineForest Products Laboratory, Madison, Wisconsin. Testing a block of wood to show the effect of compression parallel to the grain. As pressure is applied to the block, a lamb's roller extensometer is us. 1942-01-01. Delano, Jack. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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