Physiological Bureau of Mines, 11598; Scope and content: This report, by R. R. Sayers, H. R. O'Brien, F. V. Meriwether, and W. P. Yant, include photographs from the physiological report number 287-B064. The report detailed the observations of any changes taking place in the bodies of men standing, or driving and riding in automobiles, in a model tunnel having varied forms of veniliation.

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Photo credit: © Alpha Stock / Alamy / Afripics
License: Licensed
Model Released: No

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