Account Series -- Edison & Murray :: Books of Original Entry -- PN-75-01-04 (1875)
This pocket notebook records sales of Edison's inductorium, an electromedical device for administering electric shocks, in January 1875. It is a daily log of buyers and of payments received. Starting from the back cover are undated lists of workers and hours. The front cover is labeled "Inductorium & Ink Recorder Sales." Eight pages of this unnumbered book have been used.