London : Longman, Rees, Orme, Brown, Green, and Longman · leaf 115
ik*vi:s;ftk^v*:i^^>i^^3ti … inside frame to open. Now, if he places the point of one leg of his dividers inthe centre of the hinge at a, and extends the point of the other leg diagonallyacross to the opposite internal angle, he will find, by describing an arc from Retrospective Criticism. 95
Architecture
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