This journal covers the period January 1, 1877-April 8, 1878 and contains entries by Batchelor about his experiments on the electric pen, phonograph, and telephone. Other entries deal with the quadruplex telegraph and Batchelor's personal affairs. The book contains 365 pages, numbered by an archivist. After writing the entry for December 31, 1877, Batchelor returned to the first page of the book and began recording entries for 1878. Pages 1-98 (January 1-April 8) thus contain entries for both 1877 and 1878. The front cover is stamped "Diary 1877."
[MBJ001] Diary, 1877-1878 1877-1878
[MBJ001015], Diary, Charles Batchelor, January 15th, 1878 1878-01-15
[MBJ001019], Diary, Charles Batchelor, January 19th, 1878 1878-01-19
[MBJ001039], Diary, Charles Batchelor, February 8th, 1878 1878-02-08
[MBJ001061], Diary, Charles Batchelor, March 2nd, 1877 1877-03-02
[MBJ001071], Diary, Charles Batchelor, March 12th, 1878 1878-03-12
[MBJ001084], Diary, Charles Batchelor, March 25th, 1877 1877-03-25
[MBJ001096], Diary, Charles Batchelor, April 6th, 1878 1878-04-06
[MBJ001138], Diary, Charles Batchelor, May 18th, 1877 1877-05-18
[MBJ001211], Diary, Charles Batchelor, July 30th, 1877 1877-07-30
[MBJ001236], Diary, Charles Batchelor, August 24th, 1877 1877-08-24