sepia coil printed "Historic ring of soft iron, wound with separate coils of copper wire connected to battery and galvanometer respectively, used by Faraday in his first successful experiment in electro-magnetic induction"
sepia books printed "Title page from Faraday's bound notes of Sir Humphry Davy's course of lectures on chemistry. It was this volume which Faraday sent to Davy and which led to his engagement as scientific assistant in the laboratory of the Royal Institution. Bound by Faraday himself"