smog testing-650

Example of human subject research (smog chamber breathing) at the Stanford Research Institute in 1956.

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

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