vintage Gischard Barometer in a ship wheel design

The item is a vintage Gischard Barometer in a ship wheel design, used to measure atmospheric pressure and predict weather changes. Function: Measures air pressure to forecast weather. Mechanism: The needle indicates pressure, with rising pressure suggesting good weather and falling pressure indicating potential storms. Normal Range: At sea level, normal pressure is around 29.9 inches of mercury (inHg), ranging from about 29.6 to 30.2 inHg. Maker: "Geo. S. Thomson Co., Inc." of El Paso and Phoenix. Usage: To set it, find the local barometric pressure online and adjust the screw on the back until the pointer matches the reading. Interpretation: Steady pressure suggests no change, slowly falling pressure indicates minor changes, and rapidly falling pressure suggests rain or snow.