Large 8vo. In two volumes. xii, 538; viii, [2], 541-1078pp, [2]. With a photographic frontispiece to each volume. Original publisher's navy cloth, contrasting red cloth lettering-pieces, blue printed dustwrappers. Minor shelf wear, dustwrappers price-clipped and a trifle rubbed. Internally clean and crisp.

The first edition, edited on behalf of The Royal Institution of Great Britain by L. Pearce Williams, of the key correspondence of natural philosopher and scientific adviser Michael Faraday (1791-1867).