These records cover the period 1899-1928, with most of the documents dating from 1899-1904. They consist of correspondence, agreements, meeting announcements, and other documents relating to incorporation and financial matters. A few of the documents are written or signed by Edison or bear his marginalia. Included are copies of the company's certificate of incorporation and bylaws; a draft of Edison's report to the stockholders' meeting of April 14, 1903; and a draft of the agreement executed with Edison on June 9, 1899. Other items concern the decisions in 1904 to double the output of the cement works at Stewartsville, New Jersey, and to issue a mortgage bond. Also included is material pertaining to an increase in capital stock in 1907.

Approximately 10 percent of the documents have been selected. Many of the unselected items are agreements, including one relating to diamond-drill operations and a variant version of the agreement of June 9, 1899. A few of the unselected agreements, leases, waivers, and proxies are signed by Edison. Also not selected are documents pertaining to the company's gold bonds of 1904; specifications for equipment; statements of unsettled accounts; estimated requirements for labor and material (1903-1904); and stock certificates.