This instrument, generally known a baro-thermograph records both atmospheric pressure and temperature on the same chart. The two recording arms move freely past each other over a weekly chart. This instrument has a golden walnut case with bevelled glass and the brass movement is in a deep gold effect lacquer. There are two ink bottles with red and blue ink to record the separate elements. Signed by Harrods, the iconic London store, this instrument was probably made by Short and Mason for the retailer. Charts supplied.
Combined Barograph an Thermograph by Harrods