BORING, in Mineralogy, a method of piercing the earth with scooping irons, which being drawn back at proper times, bring up with them samples of the different strata through which they have passed; by the examination of which the skilful mineralogist will be able to guess whereabouts a vein of ore or a stratum
VOL. IV. Part I.
of coal may lie, or whether it will be worth while to open a mine for the purpose of working it.