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N all the parts of human knowledge, whether terminating in cience merely peculative, or operating upon life private or civil, are admitted ome fundamental principles, or common axioms, which being generally received are little doubted, and being little doubted have been rarely proved.

thee gratuitous and acknowledged truths it is often the fate to become les evident by endeavours to explain them, however neceary uch endeavours may be made by the miapprehenions of aburdity, or the ophitries of interet. It is difficult to prove the principles of cience, becaue