This folder contains correspondence and other documents relating to the commercial and technical development of Edison's alkaline storage battery and its use in lightweight electric delivery wagons. Included is data from a survey of the operating costs of horse-drawn delivery wagons, conducted under Edison's supervision by his assistant William H. Meadowcroft. Among the participants were Bloomingdale's, Borden's Condensed Milk Co., R. H. Macy & Co., and Saks & Co. in New York City; Abraham & Strauss in Brooklyn; and L. Bamberger & Co. and Hahne & Co. in Newark. Also included is a sample of the letters of introduction sent to would-be participants.

Less than 10 percent of the documents have been selected. The items not selected consist of duplicates, additional correspondence with participating firms, and questionnaires containing raw data.