Beschreibung:

A late Victorian lacquered and patinated brass monocular microscope Negretti and Zambra, London, late 19th century With rack and pinion coarse and fine top-screw focus adjustment and double objective nosepiece above rectangular stage fitted with slide clips over sub-stage condenser and pivoted plano-concave mirror beneath, the limb fixed via pivot joint behind the stage onto a shaped base inscribed NEGRETTI & ZAMBRA, LONDON to rear and with three angled supports fitted with brass disc feet, in original mahogany box with two objective lens canisters, additional eyepiece lens and other accessories, the box 31cm (12.25ins) high excluding handle; with a Victorian lacquered and patinated brass monocular microscope, unsigned, late 19th century, with body tube screw-fitting into a collar over rack-and pinion focus screws and simple stage with oculus and plano-concave mirror beneath, the limb fixed via pivot joint beneath the stage onto a Y-shaped base, in original mahogany box with various accessories including light magnification lens and stand and with slide drawer to base, the box 27cm (10.5ins) high excluding handle, (2). The firm of Negretti & Zambra are recorded in Banfield, Edwin BAROMETER MAKERS AND RETAILERS 1660-1900 as being established in 1850 when a partnership between Enrico Negretti and Joseph Warren Zambra was formed. The firm became one of the most prolific makers of scientific instruments and continued trading well into the 20th century.