Note 118 — XXI.

We cannot help stating here that we think it far from unimportant, that when employed to measure the altitude of prominent objects, the Aneroid may be made to supply widely different results from those of the ordinary barometer, as the elimination of gravity in the Aneroid readings remains as a constant element, and hence the difference between the two can only be rectified by due regard being had to this circumstance, when performing the requisite calculations.