This notebook covers the periods December 1903 and May 1905. All entries are by Edison. The entries from 1903 relate to x-ray experiments. The enumerated experiments, slides 1- 253 and 381-388, are a continuation of those found in N-03-12-12.2. Several entries contain references to a "big book" into which some of the notes were copied. The notes and drawings from 1905 pertain to storage batteries. Included are calculations regarding the performance of a Lansden "Tonneau" automobile. There are also a few scattered phonograph drawings. The front cover is labeled "x ray." The pages are unnumbered. Approximately 170 pages have been used.
Pages containing only slide numbers, with no data recorded, have not been selected.