DOI Page / Citation link:
https://doi.org/10.11588/diglit.19575#0283
25S S H A
The reafon why Shadows fall all one way. Firft, becaufe the
light does not, with all its brightnefs, illuminate any more than
that part that is dire£tlv oppofite to it.
Secondly, it proceeds from the nature of the eye; for the
firft part of the body, coming to the eye with a bigger angle, is
feen more dimiiftiy ; but the fecond part, being further off, is
feen by the eye in a lefler angle.
And if you are to draw two or three men {landing together, one
behind another, though all of them receive equally the light, yet
the fecond, being further from the eye, muft be fhadowed darker,
and the third more dark than the fecond.
It is a general obfervation, that, if you draw many figures to-
gether in one room, they muft all be fhadowed on the contrary
fide from the light, whether it comes in at the middle, or end,
or any where elfe.
Again, that part of the body muft be made lighten1, which
hath the light moll directly oppofite to it; as, if the light be
placed above the head defcending, then the top of the head muft
be made the lighted, the moulder next lighteft, and fo you mufi
lofe by degrees.
That part of the body that ftands fartheft out muft be made
lighteft, becaufe it comes neareft to the light, and the light lofes
fo much of its brightnefs, by how much any part of the body
bends inward ; becaufe thofe parts that ftick out, do hinder the
lurtre of the full brightnefs of the light from thofe parts that fall
any thing more inward ; therefore, by how much one part of the
body fticks out beyond the other, it muft be made fo much lighter
than the other, or, if it fall more inward, then it muft be made
more dark.
As for fattins and filks, and all other fhining fluffs, they have
certain bright reflections, exceeding bright, with Hidden light
glances, elpecially where the light falls the brighteft ; and fo the
reflections are lefs bright, by how much the garment falls more
inward from the light.
The like is feen in armour, and brafs pots and kettles, or any
glittering metals ; you may fee a fudden brightnefs in the middle
or center of the lisht, which caules the £hinirjg nature of fuch
things.
SHAMMY or Chamois leather, popularly called Shammy;
a. kind of leather, either dreiled in oil, or tanned, much efteemed
for its foftnefs, pliancy, &c
It is prepared from the flrin of the chamois, a kind of wild
goat, called alio ifard, inhabiting the mountains of Dauphiny,
Savoy, Piedmont, and the Pyrcneans.
£efides the ioftnefs and warmnds of the leather, it has tnc
faca'ty
The reafon why Shadows fall all one way. Firft, becaufe the
light does not, with all its brightnefs, illuminate any more than
that part that is dire£tlv oppofite to it.
Secondly, it proceeds from the nature of the eye; for the
firft part of the body, coming to the eye with a bigger angle, is
feen more dimiiftiy ; but the fecond part, being further off, is
feen by the eye in a lefler angle.
And if you are to draw two or three men {landing together, one
behind another, though all of them receive equally the light, yet
the fecond, being further from the eye, muft be fhadowed darker,
and the third more dark than the fecond.
It is a general obfervation, that, if you draw many figures to-
gether in one room, they muft all be fhadowed on the contrary
fide from the light, whether it comes in at the middle, or end,
or any where elfe.
Again, that part of the body muft be made lighten1, which
hath the light moll directly oppofite to it; as, if the light be
placed above the head defcending, then the top of the head muft
be made the lighted, the moulder next lighteft, and fo you mufi
lofe by degrees.
That part of the body that ftands fartheft out muft be made
lighteft, becaufe it comes neareft to the light, and the light lofes
fo much of its brightnefs, by how much any part of the body
bends inward ; becaufe thofe parts that ftick out, do hinder the
lurtre of the full brightnefs of the light from thofe parts that fall
any thing more inward ; therefore, by how much one part of the
body fticks out beyond the other, it muft be made fo much lighter
than the other, or, if it fall more inward, then it muft be made
more dark.
As for fattins and filks, and all other fhining fluffs, they have
certain bright reflections, exceeding bright, with Hidden light
glances, elpecially where the light falls the brighteft ; and fo the
reflections are lefs bright, by how much the garment falls more
inward from the light.
The like is feen in armour, and brafs pots and kettles, or any
glittering metals ; you may fee a fudden brightnefs in the middle
or center of the lisht, which caules the £hinirjg nature of fuch
things.
SHAMMY or Chamois leather, popularly called Shammy;
a. kind of leather, either dreiled in oil, or tanned, much efteemed
for its foftnefs, pliancy, &c
It is prepared from the flrin of the chamois, a kind of wild
goat, called alio ifard, inhabiting the mountains of Dauphiny,
Savoy, Piedmont, and the Pyrcneans.
£efides the ioftnefs and warmnds of the leather, it has tnc
faca'ty