This notebook contains notes and drawings on telegraph and battery experiments. All are by Charles Batchelor except for one page by Edison. The first page is dated Sunday, September 7 (probably 1873); the only other dated entry is for March 18. On the last page is a description, signed by Batchelor, of a visit by an unnamed person. The front cover is marked \"Experiments\"" in ink, with \""Batch\"" written in pencil underneath. Thirteen pages of this unnumbered book have been used."