N-87-00-00.4 (ca. 1887-1888)
This undated notebook was used by Edison, probably in 1887 and 1888. It contains drawings and a few notes regarding phonograph designs, including one drawing labeled \"phonograph movements for 1878 model.\"" The front cover and spine are both labeled \""1.\"" The pages are unnumbered. Approximately 80 pages have been used. One loose page has been inserted into the book."