This folder contains correspondence and other documents relating primarily to market conditions, legal matters, and product quality. Among the correspondents are Edison, William E. Horne, Herman E. Kiefer, Walter S. Mallory, William H. Meadowcroft, and Harry F. Miller. Included are numerous items regarding tests and experiments at the Stewartsville works. Other documents pertain to litigation involving Edison's long kiln; political efforts to promote concrete roadways; and the sale of pulverized limestone through farm granges. There are also a few items relating to changes in government regulations, including one letter concerning Arthur J. Eddy's book, The New Competition, and another mentioning a conversation between Edison and financial consultant Roger W. Babson about the Sherman antitrust law. Some letters pertain to Edison's schedule and to visitors to the West Orange laboratory, including industrialist Charles M. Schwab.

In addition, there are numerous letters concerning other Edison businesses, including the New Jersey and Pennsylvania Concentrating Works (NJPCW) and the North Jersey Paint Co. A few items relate to Edison's purchase of NJPCW's assets and to litigation against the company by the Cutting family of New York. One document describes an accident at the Stewartsville works involving shovels that were originally purchased for NJPCW. Other items pertain to Edison's crushing technology and its possible use in asbestos production by the H. W. Johns-Manville Co. Also included are a letter from L. R. Caragol discussing the potential for cement sales in South America and proposing to open a movie house in East Orange; and a credit reference for Charles H. Calehuff, a kinetoscope jobber.

Approximately 50 percent of the documents have been selected.