Arthur L. Fisk Jr. to Mrs. R. A. Duhamel and Dr. Fred C. Brock on Rock Wool Dermatitis (1952)

Two letters from Arthur L. Fisk Jr. of Johns-Manville. On June 20, 1952, he answered Mrs. R. A. Duhamel of Reseda, California, who had written about a skin disorder, offering to send her physician what J-M knew about treating it; she returned the letter with her doctor's card. On June 27 Fisk wrote to Dr. Fred C. Brock of Burbank about dermatitis "which on infrequent and rare occasions has arisen in our factories in connection with the few people who are allergic to rock wool." He described four kinds of skin reaction seen from rock wool contact and their treatment.

In Johns-Manville's chronology

Johns-Manville's own chronology of what the company knew describes this document as follows:

Letters from Arthur L. Fisk dated 6/20/52 and 6/27/52, to Mrs. Duhamel and her physician, Dr. Brock, replying to request for information on treating dermatitis from exposure to rock wool.