Part Of: Notebook Series -- Notebooks by Edison and Other Experimenters -- Disc Record Books

[NA321-F] N-16-03-07 (1916)

This notebook was used by Edison during March 1916 for notes on experiments to improve the manufacture of disc records. Two entries at the beginning of the book give a "Standard Printing Schedule" and a "Standard Transfer Schedule." These are followed by notes describing a sequence of experiments numbered from 478E to 511E in which the "standard" schedules are varied in terms of heat and pressure during the transfer and printing processes. Many of the entries include a summary of acceptable and unacceptable transfers or prints obtained. Among the problems noted are red spots and blisters. Other experiments in this sequence involve various processes of brushing varnish onto record blanks and experiments with the ovens. The entry for experiment 498E indicates that the test records were reinspected in May and September 1916. Some notes are in the form of instructions to Sherwood T. (Sam) Moore, Archie D. Hoffman, or other employees. Additional notes on some of the experiments in this book can be found in N-16-04-26, Notebooks by Other Experimenters -- Phonograph Record Experiments -- Miscellaneous Disc Composition Books. Inserted into the book are several loose items, including a note by Frederick P. Ott and a 1918 communication from laboratory employee Joe Miller to Edison. The front cover is labeled "10." The pages are unnumbered. Approximately 100 pages have been used.

Courtesy of Thomas Edison National Historical Park.

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