Page 102

102              ANALYSIS of BEAUTY. 
then be accompanied by its correfponding form, a 
circle I. 
But to return; we obferv'd that all the degrees of 
obliquity in the moving of planes or flat furfaces, have 
the appearances of their receflion perfeded to the eye 
by the firfi fpecies of retiring fhade. For example, then ; 
when the door opens, and goes from its parallel fitua- 
tion with the eye, the ffiade laft fpoken of, may be ob- 
ferved to alter and change its round gradating appear- 
ance, into that of gradating one way only; as when a 
ftanding water takes a current upon the leaft power 
given it to defcend. 
Note, if the light fhould come in at the door-way, in- 
flead of the window, the gradation then would be re- 
verfed, but frill the effeCt of receffion would be juft the 
fame, as this fhade ever complies with the perfpe6tive 
lines. 
In the next place, let us obferve the ovolo, or quarter- 
round in a cornice, fronting the eye in like manner, by 
which may be feen an example of the fecond fpecies ; 
where, on its moft proje&ing part, a line of light is 
feen, from whence thefe fhades retire contrary ways, 
by which the curvature is underftood. 
And, perhaps, in the very fame cornice may be feen an 
example of the third fpecies, in that ornamental member 
1 Note, if the light were to come in at a very little hole not far 
from the door, fo as to make the gradation fudden and ftrong, like 
what may be made with a fmall candle held near a wall or a wainfcot, 
the bafon would appear the deeper for it. 
called