London: Royal Society of London, 1885. Hardcover. First Edition. ix, , 506 pp. 8vo. Green cloth bindings with burgundy title patch and gold titling to spine of each volume, call number handwritten in white ink at base of each spine. Wear and scuffing to both from library use. Ex-library with bookplate and library stamp on title page of each volume, some library stamps within. Numerous plates illustrate articles. Very Good.
William Henry Preece (1834–1913) confirmed Thomas Edison's experiments demonstrating thermionic emission and coined the term, "Edison effect."