This notebook, which covers the period December 1891-May 1892, was used by Frank A. Wardlaw to record information about standard Edison dynamos and motors. Also included are items pertaining to "old style" Edison dynamos, Sprague motors, and a motor for a Sims-Edison torpedo boat. One entry is entitled "Formulae for Standard Cell (Daniell)." The book contains 59 unnumbered pages.

Courtesy of the Wichita State University Libraries.