June 28, 1956: Chemical engineer Edward Liston, right, of Stanford Research Institute checks on five subjects in a smog chamber breathing reconstituted smog and noting reactions on pads. The testing was being conducted at SRI labs in South Pasadena.
This photo by staff photographer Jack Carrick accompanied a June 29, 1956, Los Angeles Times story reporting the Stanford Research Institute enlarging its presence in Southern California.
June 28, 1956: Smog testing with human subjects [970×615] from HistoryPorn