Details
A black-enamelled brass wavelength spectroscope,
by Beck, London, with sighting tube, adjustable slit, and micrometer fine adjustment, in mahogany case -- 13½in. (34.3cm.) wide; and two hardness testers by Troughton & Simms, in mahogany cases -- 11½in. (29.5cm.) wide (3)
by Beck, London, with sighting tube, adjustable slit, and micrometer fine adjustment, in mahogany case -- 13½in. (34.3cm.) wide; and two hardness testers by Troughton & Simms, in mahogany cases -- 11½in. (29.5cm.) wide (3)