Notebook, PN-87-00-00.4 (ca. 1887)
This undated notebook was probably used by Edison about 1887. It contains a few calculations and drawings, some of them concerned with generators. In the middle of the book are a guest list and menu written by Mina Miller Edison. The front cover is stamped \"Note Book.\"" The pages are unnumbered, and the book has been used in both directions. Approximately 40 pages have been used."