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242 and Geometricians unite, as much as poible, the Practice with the Theory. , but o it is, that thoe Things which reflect the greatet Honour on the human Mind, are frequently of the leat Benefit to it! A Man who undertands the four Fundamental Rules of Arithmetic, aided by a little good Sene, hall amas prodigious Wealth, in Trade, hall become, a Sir Peter Delmé a Sir Richard Hopkins, a Sir Gilbert Heathcot, whilt a poor Algebrait pends his whole Life, in earching for atonihing Properties and Relations in Numbers, which at the ame time are of no manner of Ue, and will not acquaint him with the Nature of Exchanges. This is very nearly the Cae with mot of the Arts; there is a certain Point, beyond which, all Reearches erve to no other Purpoe, than merely to delight an inquiitive Mind. Thoe ingenious and ueles Truths may be compar'd to Stars, which, by being plac'd at too great a Ditance,