Percival, A. S. (Archibald Stanley), 1862- · London ; New York [etc.] : Longmans, Green and Co. · leaf 37
ng this graphically thatis due to Euclid (vi. 13 and 19). Let AB be the width (or the height) of the original picture,then if a copy one-third of the size is required, AB is producedto K making BK one-third of AB. Now bisect AK at O, andon AK describe a semicircle of radius OA, and erect a… … Join AD and mark off from B any dimension that must becopied. Suppose that there is a lake in the original, we mark offits width, say it is BC, draw CE parallel to AD and the width inthe copy is BE. Of course an enlargement is made in precisely the same way,only BK is taken to represent the…
Perspective
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