"Electricity is life : why the Davis Electric medical battery is a present day necessity."; "Davis Electric Company (Parkersburg, W. Va.)"; "Electricity in medicine.", "Electric batteries."; "Davis Electric Company (Parkersburg, W. Va.)"; "undated"; "

Pamphlet.

"; ""; "P15596"; "pec"; "Electricity in medicine.", "Electric batteries."; "14256"; .