[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.]

These sixteen notebooks, which cover the years 1912-1916 and 1920, relate to the plating processes used in producing disc records. Most of the entries are by William Walter Dinwiddie. Other employees who are identified as working on similar experiments include Charles Beaumont, A. Boetsch, Leroy E. Briggs, Peter C. Christensen, Peter Dempsey, William A. Hayes, John McMullen, F. Meschmeyer, Joseph Miller, Frederick P. Ott, Elroy Pearsall, and Albert F. Wurth.

The experiments in these books were aimed at improving the plating practices involved in making masters and submasters for disc records and at resolving specific problems in current practices. Edison's in this work is shown by references to plating experiments performed by him, as well as by references in several books, particularly N-13-04-04.2, to statements made by "Mr. E." The gap in plating work from 1916 to 1920 in this subgroup, as well as in the Notebooks by Edison series, is most likely due to Edison's decision to concentrate his efforts and his staff on work for the Naval Consulting Board and inventions for the U.S. Navy.

Although the notebooks in this subgroup are loosely related to each other, they deal with a variety of experiments. For example, there is a set of three books consisting of daily records of masters, their plating, and the results of the plating. Included are entries with some or all of the following information about the experiment: an identifying number for the record, the title of the recording, the recording artist, the type and condition of the record, room and bath temperatures, times and amps for the bath, and a report on results. Some books contain lists of various experimental plating solutions and their ingredients. Other books include plating "schedules" and formulas for various solutions used in the plating process. There are also books describing experiments with various ingredients, such as graphite, and different parts, such as anodes, that were used in the plating process.

Two notebooks have been selected because they include secret formulas and processes used in the plating of Edison disc records and because of their strong indication of Edison's involvement.