This notebook covers the period February-October 1879. Most of the entries are by Edison. There are some entries by Francis Upton. The name of Charles Batchelor appears occasionally as a witness. Material by Edison includes drawings of the electric pen; specifications for an English patent on the electric light system, which cover the lamp, regulator, generator, and meter; notes on electricity and magnetism; and drawings of generators. Material by Upton includes notes and calculations from resistance tests on carbon, chalk, and sulphide of molybdenum, as well as calculations and drawings of electric power distribution Systems. There are also some hand-drawn maps of Europe, Africa, and the Western Hemisphere at the end of the volume. The label on the front cover is marked "English Patent &c." The book contains 284 numbered pages.
Blank pages: 20, 23-27, 208-213, 222-225, 230-247, 250-251, 256-265, 272-273.
Missing page numbers: 21-22.
[N029001], Technical Note, Thomas Alva Edison, February 15th, 1879 1879-02-15
[N029019] Technical Note, c. 1879 1879-00-00
[N029031], Patent Application, Thomas Alva Edison, May 1st, 1879 1879-05-01
[N029163], Technical Note, Francis Robbins Upton, October 17th, 1879 1879-10-17
[N029167], Technical Note, Francis Robbins Upton, October 20th, 1879 1879-10-20
[N029171] Technical Note, c. 1879 1879-00-00