London : Longman, Rees, Orme, Brown, Green, and Longman · leaf 202
introduced. Hence,the advantage of the sky and ground lines ; and their mutual re-lation is shown in^^. 26.: they change places when / is as muchabove the half height of the cube as it is now below it; theirsections are respectively transferred by the parallel ruler, or bymarks on the straight edge… … next drawn. In the engraving fig. 26., illustrative of these re-marks, a is the ground plan; 5, vertical plan ; c, plane equal-ising the rays; d, station point; e, ground line ; f, sky line ;and, when the diagram is turned round, g is the true perspectiveview of the object. Figs. 27. and 28. show…
Architecture
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