A French Louis XVI giltwood mercury wall barometer Unsigned, late 18th century With mercury syphon tube and 8 inch circular white painted register annotated in barometric inches from twenty-six and two thirds to twenty-nine and one third divided into twelfths, the outer track with the usual weather observations in French, the case with surmount carved with a globe within laurel wreath over moulded glazed bezel to the register flanked by Centigrade and Reaumur scale twin alcohol and mercury tube thermometers beneath outswept fruiting C-scroll decoration, the lower section with bevelled rectangular mirror plate flanked by palm foliage over scallop-shell and scroll carved base, 103cm (40.5ins) high.