This notebook covers the period March-October 1880. Most of the entries are by Charles Batchelor and Charles Flammer. There are also a few entries by Edison. The name of Martin Force appears occasionally as a witness. Many of the notes and drawings relate to experiments in treating carbonized paper and fiber. Most of these are numbered. There are also notes and drawings of clamps, internal connections, carbon molds, and devices to straighten the carbons. One set of notes and drawings relates to a series of vacuum pump experiments. The label on the front cover is marked \"Carbons\"" and \""C. Batchelor.\"" The book contains 284 numbered pages.

Blank pages: 270-277, 282-283.

Missing page numbers: 75-76."