This volume covers the period January-November 1878, with a few dated items for 1879. The notes and drawings are by Edison, Charles Batchelor, James Adams, and John Kruesi. Most of the material relates to the telephone. There are also a few drawings of the aerophone, the aurophone, the phonograph, and the microphone. The volume consists of 173 numbered, unbound pages.
Several items from Vol. 14 were published in The Papers of Thomas A. Edison, Vol. 4.
Missing pages: 8-9. One additional page missing from this volume can be found in facsimile in the Telephone Interferences. Courtesy of Thomas Edison National Historical Park.