Abarometer measures the pressure of the atmosphere at different altitudes. identify the location where the column of mercury is lowest in the barometer.

Explanation:

At very high altitudes of Earth's atmosphere it is observed that the column of mercury is lowest.

As we move at high altitudes in the atmosphere there is less overlying mass as a result the atmospheric pressure decreases.

Thus, it can be concluded that the column of mercury is lowest in the barometer at very high altitudes of atmosphere.

what's the question?

explanation:

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.