This notebook contains details of chemical experiments relating to batteries. The cover is marked "DONT TOUCH / BATCHELOR" and most of the entries are in his hand. The book also contains a list of "Finished work" and a list of piecework done by various workmen. The year is probably 1875, since the entry for employee Kraft for May 20 corresponds with that in Kraft's 1875 time book, PN-75-01-08, Accounts Series. Approximately 20 pages of this unnumbered book have been used.