N-Undated.2 (ca. 1901-1902)
This undated notebook was probably used sometime during the period 1901-1902. All entries are by Edison. The book contains notes and drawings regarding the technical details of cement production. Included are items pertaining to the temperature of the kiln in the roasting process and the degree of fineness needed in the ground cement rock. The pages are unnumbered. Approximately 170 pages have been used.