Measuring of DEPTHS by the Barometer

Measuring of DEPTHS by the Barometer, depends on the same principles on which heights are measured by

the same instrument. The mensuration of depths being chiefly applied to mines, is still more precarious than the mensuration of heights, on account of the various kinds of vapours with which the subterranean regions are filled. But for a particular account of these difficulties, with the best methods of obviating them, see BAROMETER and MINES.