[The following note describes a series of notebooks and has no document records attached to it. For that reason, a "no Documents found" message will appear if the "List Documents" button at the bottom of the note is used. To see the records in the notebooks described here, use the "Which Series Notes?" button to enter the Series Notes or use the "Next Text" button to move to the first item in the series.]

This group of eleven notebooks was used during the period June 1920-March 1921. All of the entries in the first book and in N-20-08-18.2 are by Edison. The other books generally begin with entries by Edison and continue with increasing numbers of entries by Walter N. Archer, John McMullen, Frederick P. Ott, and other experimenters. The later books include only occasional Edison notes and comments, and the final book (not selected) contains no Edison entries. Other researchers whose names appear in the books include Irving Adelsohn, Frank Detlef, Jr., Paul B. Kasakove, Sherwood T. (Sam) Moore, and W. J. Taylor.

The books describe a variety of experiments to improve the disc record manufacturing process, particularly the plating baths, and to solve problems with current electroplating. There are also experiments with various ingredients, equipment, and procedures.