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An oak cased barograph, Negretti & Zambra, London, early 20th century. With seven-part expansion chamber within lacquered brass armature signed NEGRETTI & ZAMBRA, LONDON operating inked pointer for the rotating paper-scale lined drum, with five bevel glazed panels to cover and on a cavetto moulded base with chart drawer to front, 36cm wide. Visit www.dnfa.com for condition reports.
A BAROGRAPH, in lacquered brass, the recording drum containing the clockwork mechanism with platform lever escapement and stamped on the top plate PATENT 371502, with nickel plated diaphragm, on oxidised base, the oak case with drawer and bevelled glass lights, 21cm h, c1900 ++The base with old encrusted ink stain but in otherwise good original condition, complete and in apparently going order
An early 20th Century barograph, by Negretti & Zambra, London, with brass cylinder, eleven-coil vacuum chamber, two ink bottles, two arms, one inscribed "Barograph", the other "Thermograph", contained in oak case with bevelled glazed panels and drawer below, 14 3/4in. x 9 1/4in. x 9in. high. See illustration
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