This folder contains correspondence relating to the widely publicized development of Edison's poured concrete house. Much of the material consists of unsolicited inquiries regarding the unique nature, quick construction, and low cost of the projected house. Also included is correspondence concerning designs and waterproof paints for the house, as well as requests to view Edison's one-quarter scale model. In addition, there are letters by the manufacturer and philanthropist, Henry Phipps, and by Joseph Fels, the manufacturer of Fels-Naptha soap; and letters and circulars concerning the business of the North Jersey Paint Co., an Edison company organized in 1908 to manufacture waterproof paints for cement surfaces. Many of the unsolicited letters contain Edison marginalia, usually indicating that a circular be sent in response. Copies of two such circulars, one typewritten and the other printed, can be found in this folder.

Less than 10 percent of the documents have been selected. With the exception of a few samples, unsolicited inquiries have not been selected.