Notebook Series -- Notebooks by Other Experimenters -- Phonograph Experiments -- General
[NB185-F] N-09-01-03 (1909)
[This note covers all of the notebooks in Group 7: Phonograph Experiments -- General.]
This subgroup contains general notebooks that focus on the chemical composition, hardness, durability, and molding of record cylinders and discs. The research documented in these books ranges from tests of waxes and metallic soaps for cylinders to later work with shellac and other resinous compounds for discs.
Courtesy of Thomas Edison National Historical Park.