Maxwell (James Clerk): A Treatise on Electricity and Magnetism, 2 vols., third edition, 8vo, Oxford, 1904, illustrations and diagrams, original cloth -- Reynolds (James): Illustrations of Natural Philosophy, plates 25-35 only, 4to, 1850, 11 hand-coloured engraved plates by James Emslie (occasional light soiling and browning), unbound as issued in original cloth portfolio (spine slightly split) -- Cumming (J.): On the Connection of Galvanism and Magnetism and On the Application of Magnetism as a Measure of Electricity, 4to, Cambridge, 1821, one engraved plate, later cloth -- Beckmann (John): A History of Inventions, Discoveries, and Origins, fourth edition, 8vo, 1846, engraved frontispieces (occasional light soiling and staining), contemporary calf (joints split, rubbed); and two others, with additional related material. (10)