This notebook was used by Edison and Absalom M. Kennedy, probably during 1916, for notes on experiments relating to violins and violin strings. The early entries (experiments 1-31) include numerous comments by Edison, particularly on the loudness of the recordings. The remaining entries (experiments 32-176) simply list the instrument or string and provide no comments; these have not been selected. The front cover is labeled "Tests of Musical Instruments and parts." The pages are unnumbered. Approximately 65 pages have been used.