This pocket notebook consists of a promotional calendar printed for distribution by the Vulcan Iron Works Co. Three pages from January 1902 were used by Edison for notes regarding battery experiments to be performed, as well as a briquetting experiment. Most of the proposed battery experiments involve the use of various electrolyte solutions. The front cover is stamped "1902 The Vulcan Iron Works Company, Toledo, Ohio, Manufacturers Steam Shovels, Elevator and Dipper Dredges, also Boiler Fronts."