[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.]
The eighty-two notebooks in this group cover the period 1911-1926. They were used by Charles T. Dally, Frank Detlef, Jr., William Walter Dinwiddie, Archie D. Hoffman, and Sherwood T. (Sam) Moore, and other Edison employees. Occasional notations by, or instructions from, Edison indicate his attention to their work. The experiments in these books pertain to the development and improvement of cylinder and disc phonograph records. Fourteen books with indications of oversight or involvement by Edison have been selected in whole or in part.
The notebooks are arranged in eleven subgroups: