Lot Essay
This barometer was purchased by the Cambridge Instrument Company Ltd to check, as the working standard, the calibration of altimeters manufactured during the first world war
Details
A brass "Fortin"stick barometer, signed on the body tube and on the makers plaque NEGRETTI & ZAMBRA 103 Hatton Garden, 122 Regent St., 59 Cornhill E.C. & 153 Fleet St. LONDON further inscribed on a presentation plaque W.D.Lawrence CAMBRIDGE SCIENTIFIC INSTRUMENTS Ltd. 1973, the graduated cylindrical dial numbered 748, with mercury tube, rack-and-pinion adjustment, with thermometer scale, terminating in mercury trough, mounted on mahogany backboard - 48¼in.(122.5cm)high