Details
A barograph
by Negretti & Zambra, No. 30592, with lacquered-brass mechanism, vacuum chamber, drum, recording stylus, ink bottle and thermometer, with hinged, glazed cover on mahogany base with drawer containing charts -- 14in.(36cm.)wide
by Negretti & Zambra, No. 30592, with lacquered-brass mechanism, vacuum chamber, drum, recording stylus, ink bottle and thermometer, with hinged, glazed cover on mahogany base with drawer containing charts -- 14in.(36cm.)wide