This folder contains correspondence and other documents relating to the National Waterproof Co. of Chicago, which manufactured a protective coating that was used on films produced by the Edison Manufacturing Co. and other licensees of MPPCo. Most of the letters are to or from Frank L. Dyer and Walter A. Daniels, president of the National Waterproof Film Co. Included are letters and agreements from 1911-1912 pertaining to the purchase of the company's assets by MPPCo. One letter bears a notation by Edison regarding his own stock holdings in the company. Also included are items concerning the waterproofing equipment used by the home projecting kinetoscope plant and by Edison employee William L. Jamison.

Approximately 40 percent of the documents have been selected. Related material can be found in "Motion Pictures - Correspondence - National Waterproof Film Company" in the Legal Department Records (Legal Series).