Details
A 19th-Century refracting grid,
the oxidised-brass frame with speculum mirror and grid, the brass slide with marbled finish and bevelled glass window, on three adjustable screw feet -- 5¼in. (13.3cm.) high; a spectrometer, on iron stand; and a refractometer, with silvered scale and angular adjustment, the base with mirror, by Adam Hilger Limited -- 13in. (33cm.) high
See Illustration (Part Lot)
the oxidised-brass frame with speculum mirror and grid, the brass slide with marbled finish and bevelled glass window, on three adjustable screw feet -- 5¼in. (13.3cm.) high; a spectrometer, on iron stand; and a refractometer, with silvered scale and angular adjustment, the base with mirror, by Adam Hilger Limited -- 13in. (33cm.) high
See Illustration (Part Lot)