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The elements of Euclid, viz. the first six books, together with the eleventh and twelfth. The errors by which Theon, or others, have long ago vitiated these books are corrected, and some of Euclid's demonstrations are restored. Also, the book of Euclid's Data, in like manner corrected. By Robert Simson. 13th ed., carefully rev. and improved, to which is added a treatise on the construction of the trigonometrical canon; and a concise account of logarithms