HOROLOGY
Reading edition
Watch and Clock Maker’s Handbook, Dictionary and Guide. By F. J. Britten. Eleventh edition, 450 illus., 492 pp., crown 8vo. (1915.) 5s. net.
Prize Essay on the Balance Spring and its Isochronal Adjustments. By M. Immisch. 7 illus., 50 pp., crown 8vo. (1872.) 2s. 6d.