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( 61 )

is a curious one, and does most manifestlydemonstrate the Truth in Question.

By what is advanced, Sir, you mayperceive what Knowledge and Industry arerequisite to constitute a good Smelter; I'must subjoin an unwearied Patience, and aSteadiness of Mind in his Pursuits • andother necesiary Ingredients might be added,as a found deliberate Judgment, avoidingto draw hasty Conclusions from Experi-ments, and too much Credulity in Theory:let this therefore be sufficient for the pre-sent, for he that is Master of what I haveaffign’d, will not want a good Foundation,whereon he may improve himself farther;nor is it to be questioned, but that he willmake a considerable Progress in this mostuseful Science 5 but as I have mentionedJudgment, give me leave, before I makean End, to fay a Word or two more rela-ting to* it.

A Smelter ought to be extremely exactand nice in his Judgment, that is, as I havementioned on one hand, neither too rashor too credulous, nor on the other, too opi-niated; because, oftentimes, very greatDiscoveries have been made by illiteratePeople; so it must likewise be next to Mad-ness, to scorn and flight an half roastedAlchymist, when he tells you strangeThings, that at first Sight surpass yourUnderstanding ; as that he can smelt a Dia-mond