细节
A mining air-flow meter,
the lacquered-brass cage with white-painted dial and five subsidiary dials, raised on three columns from the base, with eight-bladed aluminium fan, inscribed Anthony Casartelli, Liverpool, in fitted mahogany case -- 4½in. (11.5cm.) wide; and a milliampmeter, engraved on the underside 1504 B.L.B. 1822, in drum-shaped case with accessory and outer box by SCHALL & SON
See Illustration (Part Lot)
the lacquered-brass cage with white-painted dial and five subsidiary dials, raised on three columns from the base, with eight-bladed aluminium fan, inscribed Anthony Casartelli, Liverpool, in fitted mahogany case -- 4½in. (11.5cm.) wide; and a milliampmeter, engraved on the underside 1504 B.L.B. 1822, in drum-shaped case with accessory and outer box by SCHALL & SON
See Illustration (Part Lot)