"THE BLOOD IS THE LIFE!" ACCOMPLISHED AT LAST! THE EFFICACY OF ELECTRICITY!! Nearly all Diseases Effectually Cured by BOYD’S MINIATURE GALVANIC BATTERY! This is the opening pitch of an 1879 advertising circular for a popular medical medallion called a Boyd’s Battery.  The battery was a disc, about 1¼ inch in diameter, meant to hang from … Continue reading Finding a Boyd’s Battery: An “Electrifying” Ferry Farm Story