Advertisement for Dowflake Calcium Chloride, a product of the Dow Chemical Company marketed for use to control dust on unpaved roads and parking lots, as well as a roadway deicer. The advertisement features a colored rendering of a dust-proof road treated with Dowflake; notably, the road is described as located near the family home of U.S. President Calvin Coolidge in Plymouth Notch, Vermont. The advertisement also includes testimonials from individuals in Wisconsin, Mississippi, and Virginia attesting to Dowflake's ability to keep road surfaces damp and firm.
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Dow Chemical Company. “Dowflake Keeps This Road Dustless,” circa 1925. Advertisements from the Dow Chemical Historical Collection, Box 7. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/wm117p541.
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