DOI Seite / Zitierlink:
https://doi.org/10.11588/diglit.18733#0093
LECTURE III.
IF the principles, which in the preceding
Lectures have been honoured with your
attention. Ladies and Gentlemen, have been
so clearly stated as their importance deserves,
I may justly flatter myself, that the remainder
of our subjedt will be very eastly diseussed, and
understood; for, if we have once acquired ac-
curate ideas of objects as seen in perspedtive,
and know how to represent them justly, and
on genuine principles, we shall need very little
exertion of genius, or of study, to compre-
hend aright the natural effedts of their Sha-
dows, which at this opportunity are to be
investigated.
Shadows are deprivations orabsences of light,
caused by the interposition of bodies sufficient-
ly dense to prevent the passage of luminous
rays ; and though it cannot, with exadt pro-
priety, be asserted, that shadows are the ofs-
spring of light j yet it must be granted, that,
without light, there would be no shadow.
L Darkness
27*
IF the principles, which in the preceding
Lectures have been honoured with your
attention. Ladies and Gentlemen, have been
so clearly stated as their importance deserves,
I may justly flatter myself, that the remainder
of our subjedt will be very eastly diseussed, and
understood; for, if we have once acquired ac-
curate ideas of objects as seen in perspedtive,
and know how to represent them justly, and
on genuine principles, we shall need very little
exertion of genius, or of study, to compre-
hend aright the natural effedts of their Sha-
dows, which at this opportunity are to be
investigated.
Shadows are deprivations orabsences of light,
caused by the interposition of bodies sufficient-
ly dense to prevent the passage of luminous
rays ; and though it cannot, with exadt pro-
priety, be asserted, that shadows are the ofs-
spring of light j yet it must be granted, that,
without light, there would be no shadow.
L Darkness
27*