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plunge himself riot into the Abyss of ima-ginary Hypothesis, with which this Scienceis overwhelmed, and, too many of its Fol-lowers are infatuated ; but let him be cau-tious in determining, and not hurried awayby too early appearing Symptoms, butprudently and patiently wait till all pro-mising ones concur, which he by Expe-rience has found to be plainly Indicants.

For Reasons already, alledged, I chusenot to undertake the Task of describinghow the Magnet is to be used ; though Ishall not be averse, but, oti the contrary,always willing to instruct such mineralStudents, in whom I find a proper naturalCapacity, bent to such philosophical In-quiries ; and wM give,-them all the Assist-ance that is in my Tower^ prodded I haveno other. Objections agaitost t|pi.

Thus, §n», I hope, es Mh? Satisfaction,I have answered youdQueries, and executedthe Task you have done me the Honour toimpose upon me. The Roughness of someof my Expressions, I desire you to be siygood as to excuse, which you may perhapsthink something harsh and severe ; but, asI have uttered them neither out of Ill-willor Malice to any, but through a Zeal forthe national Good, and a Desire to let suchas are in a manner totally unskilled in Artsand Sciences, see they are not fit Peopleto undertake the Direction of the Mines,

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