This folder contains correspondence and other documents relating to Edison's well-known idea to use concrete cast in molds as a rapid and inexpensive way of constructing durable buildings. Among the documents for 1918 are letters pertaining to efforts to secure an appointment to the U.S. Housing Commission for inventor-entrepreneur Frank D. Lambie, who was one of the leaders in attempting to put Edison's idea into practice.

Approximately 20 percent of the documents have been selected. The unselected material includes inquiries about licensees or patent holders, with routine replies stating that Edison was no longer active in the field and referring the writer to Lambie.