Physiological Report-U.S. Bureau of Mines, 18378 - NARA - 251677

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 ventilation."