Cased Barograph, with clockwork mechanism in rotating drum, eight pressure discs, ink bottle and recording arm on twin brass pillars, in glazed mahogany case, wd. 12 in., in maker's storage case.
Cased Barograph, with clockwork mechanism in rotating drum, eight pressure discs, ink bottle and recording arm on twin brass pillars, in glazed mahogany case, wd. 12 in., in maker's storage case.
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
