This notebook covers the period June-August 1899. It was used by Edison and an unidentified experimenter for notes and drawings relating to batteries, probably Edison-Lalande primary batteries. The first part of the book [not selected] contains routine logs of cell tests and is a continuation of N-99-02-28 [not selected]. On the inside front cover and resuming in the middle of the book are notes, primarily by Edison, regarding variations in battery electrolyte and electrodes. The spine is labeled \"146.\"" The book contains 2 numbered pages, followed by approximately 140 unnumbered pages. At least one page has been removed from the book.

Only the material by Edison has been selected.