Vintage HUGER ships aneroid Royal wall Weather Station Barometer

  
Vintage Royal Weather Station Barometer. Condition is "Used" made in Japan, essentially they simply measure air pressure - expressed in millibars. If you have an aneroid barometer this will display the reading by means of dial and a needle, as opposed to a mercury barometer which uses the height of liquid mercury within a glass tube. Since changes in air pressure accompany changing weather, these instruments can be used to help forecast local weather some 24-48 hours in advance. Once you have established the accurate pressure for your location, adjust the dial on the front.

The notes on the barometer face (RAIN, CHANGE etc) are broad indications and less important than the actual pressure change. Regular observation will quickly lead to a greaterunderstanding of weather patterns. Generally: -Increasing Pressure(movement of the needle in a clockwise direction) suggests improving weather, associated with a HIGH or "anti-cyclonic" pressure system. Decreasing Pressure(movement of the needle in an anti-clockwise direction) suggests deteriorating weather, associated with a LOW or "cyclonic" pressure system. Steady Pressure, typical of extended fine weather periods, suggests more of the same.

To observe the trend, the movable pointer is turned so that it sits directly above the barometer needle. Later (perhaps 6 hours for an easily-identifiable change), the barometer glass is tapped gently and the direction of movement of the needle noted. I dunno anything about the item but it's in pretty good condition. The item "Vintage HUGER ships aneroid Royal wall Weather Station Barometer" is in sale since Monday, April 12, 2021. This item is in the category "Collectables\Science, Medical\Science".

The seller is "melziebird" and is located in Cloverdale, Western Australia. This item can be shipped worldwide.