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not greatly challenge the Superiority; butthe Ignorant, like the blemished in Cha-racter, are ever seeking out for an ' fylum,which, if they can no where else meetwith, they shelter themselves under theMerit of their Anceflors, which, I amafraid, is too much the Cafe here inWales.

Now let us proceed to your second Re-quest, and shortly point out what a MineProfessor ought to know, before he entersupon the practical Part of this Science.

First, he that would aspire to be a MasterMiner, must be acquainted with that Partof natural Philosophy called Chymistry ;after which, he must repair to the Moun-tains, visit the Mines, and daily gounder Ground, that he may fee the com-mon labouring Part, and the different Me-thods of working, make himself familiarwith the different Strata of Earth, Stone,Rocks, Minerals, Fossils, and metallineVeins, passing over nothing that bears theleast Analogy or Affinity to Minerals, orthat can give him the least Insight into theArt of Mining • he must also be very in-quisitive with the Miners, and examinethem strictly as to what different Thingsthey meet with in their Way, hear whatthey like best, and what they look upon asthe most promising. Symptoms of cominginto Ore, its Duration, or the contrary j

for