comprising; Spectroscopy, By E. C. C. Baly, 1918; The Spectroscope, by Thorne Baker. 1923 from the Quekett microscope club Library sale; Proceedings of the Optical Convention 1912, from the Quekett microscope club Library sale; Telegraphy a detailed exposition of the telegraph system of the British post office, by T. E. Herbert, 1921; workshop makeshifts, by Hans Cassel, 1905; Watch & Clockmakers Handbook, dictionary & Guide, by F. J. Britten, 1889, and others, a lot