Hutchinson, G. W. Caldwell, Leighton of Stretton, Frederic Leighton, Baron, 1830-1896 · London ; New York : Macmillan and Co. · leaf 71
in proportion to ab, Join d b. Find a point e exactlyunder f, and from e draw e f parallel to c d and of the samelength. Join d f and a f. Find a point G on the ground lineexactly under 11, making a g and g h both in proportion to a b.Join ah. fk on f e will be the centre line. The standard of… … Fig. 30. Draw a horizontal ground line (on both papers). On this placea vertical line A B, the height of the block. This line A b,which can be drawn of any desired length, is to be the standardof measurement. Find how many times a b is contained in the length of the blockb c, and mark off on your…
Drawing
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