This notebook covers the period March-May 1892. At the beginning of the book are entries by Edison and Arthur E. Kennelly regarding various electrical experiments and theoretical notes relating to dynamos, dielectrics, electric lighting, and magnetism. The remainder of the book contains notes, drawings, and calculations by Kennelly and by unidentified Galvanometer Room experimenters pertaining to differential dynamometers, transformers, batteries, and a 3-wire electrical distribution system. Transcriptions of these latter records can be found in Arthur E. Kennelly Notebook #6. The spine is labeled \"135.\"" The book contains 197 numbered pages.

Only the Edison material has been selected."