The art of drawing in perspective Author:James Ferguson Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: 64 P.E R S ,P E C T IV £ Having placed the firft two pyn!- mids at A and D Upright on theit fquare bafes, as fhewn in Oper. IX: and made them of any equal hei... more »ghts at pleafure, draw E S and FS from the tops of thefe pyramids to the point of fight 5: place all the reft of the pyramids upright on their refpec- tive bafes, making their tops touch the ftraight lines ESandFS; and all the work, except the fliading part, will be finiflied. ?. Remark.—It muft be acknow- j ? , ledged, that there is fomething in this figure not quite agreeable to the eye; which is, that the two pyramids at G and / feem to be too far from thofe at A and D, when compared with the diflances between the reft.— "Eut this arifes from their being viewed (in(in the figure) at a greater diilance than the obferver is fuppofed to be at from the point of fight S; which is but 7 inches and three fourths of an inch, in viewing AT) under an angle of 60 degrees: whereas, in viewing the figure, we feldom bring the paper within lefs than a foot from the eye. r-But, if a perfon who looks ar the figure will place his eye directly over the point of fight S, fo that an imaginary line 7 inches long, from the point of fight, and perpendicular to the furface of the paper, fhall touch his eye; the clifagreeable idea will vanifh, and the reprefentation will appear natural. On which it may be proper to ob- ferve, that, when people look at per- fpedtlve drawings, they generally keep F their their eye at a greater diftance than what would form an angle of 60 degrees with the boundaries of the ob- jecl:; and therefore they fee it under an angle confiderably lefs than 60 degrees. And, for this reafon, it may be proper to inform the learner, that, in drawing perfpeftive reprefemations of objects, he had better ...« less