A fine Ross of London #657 surveyor's aneroid barometer in gilt brass, 2in diameter with suspension loop, altitude (grade) for +1000 ft., 25-31 inches of mercury (working); rare commodity with instructions on dial to keep the eye level with the point of the needle; original owner's name engraved to back "J. Jowitt Hornby from W.H.F." and dated 1903