MATHEMATICSPRACTICALLY APPLIEDTO THEUSEFUL AND FINE ARTS.BYBARON CHARLES DUPIN ,MEMBER OF THE INSTITUTE, OF THE ACADEMY OF SCIENCES , 850. &c.ADAPTED TO THE STATE OP THE ARTSIN ENGLAND,BY GEORGE BIRKBECK , Esq., M. D.PRESIDENT OF THE LONDON MECHANICS’ INSTITUTION, &C. &C.LONDON :PRINTED FOR CHARLES TAIT, 63, FLEET STREET,AND WILLIAM TAIT, 78, PRINCES STREET,EDINBURGH .