This volume covers the period October-December 1877. The notes and drawings are by Edison, Charles Batchelor, and James Adams and relate to the speaking telegraph and telephone. The volume consists of 204 numbered, unbound pagees.\n\n

There is also a drawing of the phonograph, dated November 29, 1877, which contains the page/volume inscription \"154/13\"" and which may have been considered part of this volume. This drawing, which some scholars think was used by John Kruesi to construct the first phonograph, appears with other early phonograph drawings in NS-77-003, Unbound Notes and Drawings.\n\n

Missing pages: 3, 11, 14, 44. Numerous additional pages missing from this volume can be found in facsimile in the Telephone Interferences.\n\n

Doc. 1146 in The Papers of Thomas A. Edison, Vol. 3 consists of pages from both Vol. 13 and the Telephone Interferences. For the sake of completeness, the appropriate images from the Telephone Interferences have been added to Vol. 13. The pages appear in the following order: 169 (TI), 173 (Vol. 13), 168 (TI), 175(TI)."