Magnetisme

511pp + cat. VG/none First edition. Editorial green cloth, bright gilt lettering on spine, minimal wear on upper corner, some mild foxing on endpapers, private ex-libris on pastedown, overall a VG copy. The three volumes of Thomson’s Popular Lectures and Addresses were published at different times (this was issued before Vol. II). Volume III comes with its own Index and it is devoted to navigation and marine science. From the Contents: Navigation, The Tides, Terrestrial Magnetism and the Mariner’s Compass, On Deep-Sea Sounding by Pianoforte Wire, On Lighthouse Characteristics, On the Forces Concerned in the Laying and Lifting Deep-Sea Cables.