An ebonised barograph with thermometer, unsigned, early 20th century The mechanism with eight segment aneroid chamber connected via a gilt brass armature to an inked pointer for recording the change in barometric pressure on a clockwork-driven rotating paper scale lined drum, the brass baseplate also applied with mercury tube Fahrenheit and Centigrade silvered scale thermometer, the case with five panel bevel-glazed cover above ogee moulded base incorporating apron drawer containing some spare charts and an instruction booklet, 38cm (15ins) wide.