Electric Relays: Constructional Details and Notes on the Use of Magnetic, Mercury, Thermionic and Photo-Electric Relays
184pp. Green cloth-covered boards; gilt titles on front, black titles on spine. 12mo. Spine ends, bottom edges and corners rubbed. Text block edges moderately tanned. Endpapers and first page foxing and tanning. Previous owner's embossed stamp on title page. Otherwise internally, clean, clear, bright and tight.
