This pocket notebook contains dated entries from May and October 1900. Some of the May dates have been changed to October. The pages consist of blank forms printed for use at the New Jersey and Pennsylvania Concentrating Works at Ogden, New Jersey. The entries, all of them by Edison, appear on the back of the forms. Many relate to battery experiments, including cadmium and other electrodes to be tried and various electrolyte solutions to test. Among the other tasks mentioned are the supervision of construction at the Edison Portland Cement Co. plant and consultations with Walter S. Mallory and other employees. Also included are lists of books to order and phonograph experiments to perform. The pages are unnumbered. Approximately 20 pages have been used.