An aneroid barometer on a boat should always be().
barometer()
A barometer showing falling pressure indicates the approach of a().
An aneroid barometer is an instrument().
An aneroid barometer reading should be corrected for differences in().
The purpose of the “set” hand on an aneroid barometer is to().
The most important information to be obtained from a barometer is the().
A slow,gradual fall of the barometer indicates approaching().
As a high pressure system approaches,the barometer reading().
A mercurial barometer at sea is subject to rapid variations in height (“pumping”) due to the pitch and roll of the vessel. To avoid this error,measurements of atmospheric pressure at sea are usually measured with a(n)().