Hutchinson, G. W. Caldwell, Leighton of Stretton, Frederic Leighton, Baron, 1830-1896 · London ; New York : Macmillan and Co. · leaf 68
ical line from c parallel to ab andon it mark off c e and e d both in proportion to a b. Join a d andb e. Under the side g f find on the ground line a point h. Fixthis in your drawing by getting the proportion of b h to a b.From h draw a vertical line parallel to a b, and on it find by… … C E A B~~G Fig. 27. Here a slight difficulty arises ; there is no line that can bereadily and satisfactorily taken as a standard of measurement bybeginners, therefore it is as well to mark on the ground lineunder your model a length a b equal to the real thickness of theblock, and to work from…
Drawing
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