This undated notebook was used by Edison, probably during the period 1899-1902. It has been used in both directions. Beginning at one end are notes, drawings, and calculations relating to the construction and operation of Edison's cement plant in Stewartsville, New Jersey. Included are cost and production estimates and lists of tasks to be undertaken. At the other end of the book are several pages of unidentified drawings followed by additional entries pertaining to the cement plant. The pages are unnumbered, and at least one page has been removed from the book. Approximately 160 pages have been used.