This pocket notebook was used by Edison in September 1888 for notes about experiments and tasks to be done. Many of the entries concern designs for phonographs and wax cylinders. The pages are unnumbered. Approximately 30 pages have been used.
Note: The images in this pocket notebook are quite small. They can be enlarged to a more readable size by using the "image zoom" feature of the Firefox browser. Click here to download the Firefox "image zoom" add-on. Right-click on the image to enlarge. Courtesy of Thomas Edison National Historical Park.