aneroid barometer - A mechanical barometer used to measure air pressure for warnings of changing weather.
astern - Toward the stern of a vessel, or behind the boat.
aneroid barometer - An instrument that measures and indicates air pressure; A mechanical device (rather than liquid, such as mercury). Air pressure is measured in millibars.
barometer, aneroid barometer, barograph, the glass
An instrument that displays atmospheric pressure in inches or millibars and therefore is useful in predicting weather. A barograph (recording barometer) records barometric readings over several days.
The action of the aneroid barometer depends on the effect produced by the pressure of the atmosphere on a circular metallic chamber partially exhausted of air and hermetically sealed.
were £115,303, the expenditure £90,335 In 1882 the Institution undertook, with the view of diminishing the loss of life among the coast fishermen, to provide the masters and owners of fishing-vessels with trustworthy aneroid barometers, ...
 See also: Light, After, Boat, Barometer, Line
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