Philadelphia: Journal of the Franklin Institute 1926. First Separate Edition. 413-448 pages. 8vo. Tan printed wrappers, stapled. Previous owner name (J. R. Harrison) on front wrapper. Lower right corner of front wrapper perished. Well read with spine creasing. Good. Wraps. 
An offprint from the Journal of the Franklin Institute, Vol 202, October 1926, No. 4. An interesting articles showing some historical instruments, some basic principles (for instance the musical scales covered by various instruments in Wave Length ft), and various methods of reproducing captured sounds. Williams was Chief Engineer of the Victor Talking Machine Company at the time, so this was likely state of the art when he was presenting the information.