The Elements of Perspective —— Arranged for the Use of Schools, and Intended to Be Read in Connexion With the First Three Books of Euclid

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ISBN: 9781332123964 出版年：2016 页码：182 John Ruskin Forgotten Books

Some irregularities of arrangement have been admitted merely for the sake of convenient reference; the eighth problem, for instance, ought to have been given as a case of the seventh, but is separately enunciated on account of its importance.