Dictionarium polygraphicum, or, The whole body of arts regularly digested ..: illustrated with fifty-six copper plates . ,.., ,cu/p I^U^ J.!j3 it/. XiX. /cu/^J. S H A 255 fbn and occafion require ; for which, as aifo in all the formerprecepts, the having of good prints will be of no fmall advan-tage. Of the origin ©/Shadows.— To define a natural Shadow,we do not tall it an abfoliite privation of light; for this would beto form a perfect obfcurity, wherein objects would be no morefeen than their Shadows : But we mean, by Shadow, a diminu-tion of light, occafioned by the interp
Dictionarium polygraphicum, or, The whole body of arts regularly digested ..: illustrated with fifty-six copper plates . ,.., ,cu/p I^U^ J.!j3 it/. XiX. /cu/^J. S H A 255 fbn and occafion require ; for which, as aifo in all the formerprecepts, the having of good prints will be of no fmall advan-tage. Of the origin ©/Shadows.— To define a natural Shadow,we do not tall it an abfoliite privation of light; for this would beto form a perfect obfcurity, wherein objects would be no morefeen than their Shadows : But we mean, by Shadow, a diminu-tion of light, occafioned by the interpofition of fome opaque bo-dy, which receiving and intercepting the light that fhould be cafion the plane, it is placed on, there gives a Shadow of its ownform. For light, being of a communicative nature, diHufes itfeli ori•very thini*;, not hid from it -, particularly on every thins; that isplain and fmooth : But, where there happens the Icnft elevation, a Shadow is produced, which exhibits the figure or the on the plan. The diverfitv of luminaries occafions a difference of Shadows;for, if the body that illuminates be larger than the bo
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Keywords: ., book, bookcentury1700, booksubjectarts, booksubjectindustrialarts
