The standard instrument for the measurement of atmospheric pressure is the mercury barometer, in which the air pressure is balanced against the weight of a column of mercury in a glass tube that contains a vacuum.
(The standard instrument for the measurement of atmospheric pressure; is; the mercury barometer, in which the air pressure is balanced against the weight of a column of mercury in a glass tube) (the air pressure; is; balanced against the weight of a column of mercury in a glass tube; L:the mercury barometer) (a glass tube; contains; a vacuum)
The standard instrument for the measurement of atmospheric pressure the air pressure a glass tube
is is contains
the mercury barometer, in which the air pressure is balanced against the weight of a column of mercury in a glass tube
balanced against the weight of a column of mercury in a glass tube L:the mercury barometer
a vacuum