This notebook covers the period December 1891-January 1892. It was used by Arthur E. Kennelly and an unidentified experimenter as a rough record book in the Galvanometer Room. Most of the book contains notes and calculations regarding conductor determinations for the electrical system at the Columbian Exposition. There are also notes relating to meter tests and dynamometer calibration. Transcriptions of the meter and dynamometer entries can be found in Arthur E. Kennelly Notebook #6. The spine is labeled "129." The book contains 201 numbered pages and has been used in both directions.

Only the material relating to conductor determinations has been selected.