[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 three notebooks were used by John P. Constable, Sherwood T. (Sam) Moore, and James Toy in 1914 and 1918-1921 for notes on experiments to improve Edison's cylinder records. These books indicate that the inventor was still interested in the cylinder format as late as 1920. One book contains notes and drawings relating to various possible improvements in the Model X Amberola. Another contains entries pertaining to the press used to make Blue Amberol cylinders and the printing schedule for these records. Also included are notes on experiments dealing with the composition of cylinder records.
One book has been partially selected for indications of Edison's involvement.