Hatton, Richard G · London, Chapman & Hall ld. · leaf 25
to AB, we could at once prolongAB and CD till they met. We have to find such a level line.BC is 6 feet, AD is 9 feet. Divided into six or nine parts,they both yield their scales. It will suffice, however, to divideAD into three equal parts. We thus find E 6 feet above A.EC is then parallel to AB,… … Fig. vi. Additional Notes XXI that we may know how to draw the horizon, for we haveno other indication of the level. Other prohlems depend upon what we may call the casualmeasuring points. Lines are measured by obtaining otherlines to cross their terminations. All this is dealt with onpage 71. We…
Perspective · Drawing
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