Weather Stations - "Greenwich" Barometer, Thermometer & Hygrometer - Weather Instruments Classically styled, our distinctive "banjo" shaped weather station features a German barometer, thermometer and hygrometer The barometer measures atmospheric pressure in order to forecast short term changes in the weather; the thermometer measures the temperature and the hygrometer measures moisture in the atmosphere. The barometer and hygrometer are protected by lucite cases that are surrounded by tarnish proof, lacquered brass bezels. All three scientific instruments are showcased on a wall mounted walnut finished wooden base Measures approximately: 5"W x 1.25"D x 20"H.