Hutchinson, G. W. Caldwell, Leighton of Stretton, Frederic Leighton, Baron, 1830-1896 · London ; New York : Macmillan and Co. · leaf 65
f. Then having foundf correctly, draw from f a vertical line f g parallel to a b and fixthe exact length of f g by very careful measurement with a b.Then join g a and g e. To find the centre line of the block, pro-ceed as follows. Draw diagonal lines from a to d and from e to b ;where they cross at… … C E Fig. 24. Draw A b. Mark off the length of b c on the ground line inits proportion to A B. At c draw c d parallel to a b, and of the sameheight; then join ad. Imagine a point e on the ground lineexactly under the side F G. Get this point in your drawing bycomparing the length of c e with a b.…
Drawing
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