Gravesande, Willem Jacob 's
,
An essay on perspective
Text
Text Image
Image
XML
Thumbnail overview
Document information
None
Concordance
Notes
Handwritten
Figures
Content
Thumbnails
Table of Notes
<
1 - 3
[out of range]
>
[Note]
Page: 24
[Note]
Page: 25
[Note]
Page: 25
[Note]
Page: 30
[Note]
Page: 31
[Note]
Page: 31
[Note]
Page: 32
[Note]
Page: 33
[Note]
Page: 33
[Note]
Page: 37
[Note]
Page: 37
[Note]
Page: 41
[Note]
Page: 42
[Note]
Page: 42
[Note]
Page: 43
[Note]
Page: 44
[Note]
Page: 48
[Note]
Page: 48
[Note]
Page: 48
[Note]
Page: 50
[Note]
Page: 50
[Note]
Page: 51
[Note]
Page: 55
[Note]
Page: 56
[Note]
Page: 56
[Note]
Page: 56
[Note]
Page: 60
[Note]
Page: 60
[Note]
Page: 60
[Note]
Page: 60
<
1 - 3
[out of range]
>
page
|<
<
(5)
of 237
>
>|
<
echo
version
="
1.0RC
">
<
text
xml:lang
="
en
"
type
="
free
">
<
div
xml:id
="
echoid-div8
"
type
="
section
"
level
="
1
"
n
="
8
">
<
pb
o
="
5
"
file
="
0023
"
n
="
23
"
rhead
="
on PERSPECTIVE.
"/>
<
p
style
="
it
">
<
s
xml:id
="
echoid-s251
"
xml:space
="
preserve
">The Interſection V H of this Plane, and the Per-
<
lb
/>
<
note
position
="
right
"
xlink:label
="
note-0023-01
"
xlink:href
="
note-0023-01a
"
xml:space
="
preserve
">Def. 11.</
note
>
ſpective Plane, is the Vertical Line.</
s
>
<
s
xml:id
="
echoid-s252
"
xml:space
="
preserve
"/>
</
p
>
<
p
style
="
it
">
<
s
xml:id
="
echoid-s253
"
xml:space
="
preserve
">And S H I, the Interſection of it, and the Geo-
<
lb
/>
<
note
position
="
right
"
xlink:label
="
note-0023-02
"
xlink:href
="
note-0023-02a
"
xml:space
="
preserve
">Def. 12.</
note
>
metrical Plane, is the Station Line.</
s
>
<
s
xml:id
="
echoid-s254
"
xml:space
="
preserve
"/>
</
p
>
<
p
style
="
it
">
<
s
xml:id
="
echoid-s255
"
xml:space
="
preserve
">Points of Diſtance, are two Points in the Hori-
<
lb
/>
<
note
position
="
right
"
xlink:label
="
note-0023-03
"
xlink:href
="
note-0023-03a
"
xml:space
="
preserve
">Def. 13.</
note
>
zontal Line, each way diſtant from the Point of Sight
<
lb
/>
by the length of the principal Ray; </
s
>
<
s
xml:id
="
echoid-s256
"
xml:space
="
preserve
">as MN.</
s
>
<
s
xml:id
="
echoid-s257
"
xml:space
="
preserve
"/>
</
p
>
<
p
style
="
it
">
<
s
xml:id
="
echoid-s258
"
xml:space
="
preserve
">The Geometrical Line, is a Line, that paſſes
<
lb
/>
<
note
position
="
right
"
xlink:label
="
note-0023-04
"
xlink:href
="
note-0023-04a
"
xml:space
="
preserve
">Def. 14.</
note
>
through the Station Point, and is parallel to the baſe
<
lb
/>
Line, as A B.</
s
>
<
s
xml:id
="
echoid-s259
"
xml:space
="
preserve
"/>
</
p
>
<
p
style
="
it
">
<
s
xml:id
="
echoid-s260
"
xml:space
="
preserve
">The Seat of an Object, is the Concurrence of Per-
<
lb
/>
<
note
position
="
right
"
xlink:label
="
note-0023-05
"
xlink:href
="
note-0023-05a
"
xml:space
="
preserve
">Def. 15.</
note
>
pendiculars let fall from every of its Points upon the
<
lb
/>
Geometrical Plane, and the ſaid Plane.</
s
>
<
s
xml:id
="
echoid-s261
"
xml:space
="
preserve
"/>
</
p
>
<
p
style
="
it
">
<
s
xml:id
="
echoid-s262
"
xml:space
="
preserve
">The Direction of a Line inclined to the Geometri-
<
lb
/>
<
note
position
="
right
"
xlink:label
="
note-0023-06
"
xlink:href
="
note-0023-06a
"
xml:space
="
preserve
">Def. 16.</
note
>
cal Plane, is the Interſection of the ſaid Plane, and
<
lb
/>
another Plane perpendicular thereto, paſſing through
<
lb
/>
the ſaid inclined Line.</
s
>
<
s
xml:id
="
echoid-s263
"
xml:space
="
preserve
"/>
</
p
>
</
div
>
<
div
xml:id
="
echoid-div26
"
type
="
section
"
level
="
1
"
n
="
9
">
<
head
xml:id
="
echoid-head9
"
xml:space
="
preserve
">CHAP. II.</
head
>
<
head
xml:id
="
echoid-head10
"
style
="
it
"
xml:space
="
preserve
">The Theory of Perſpective.</
head
>
<
head
xml:id
="
echoid-head11
"
xml:space
="
preserve
">
<
emph
style
="
sc
">Lemma</
emph
>
.</
head
>
<
p
>
<
s
xml:id
="
echoid-s264
"
xml:space
="
preserve
">3. </
s
>
<
s
xml:id
="
echoid-s265
"
xml:space
="
preserve
">THE Perſpective, or Appearance of a
<
lb
/>
Right Line, as A B, which being con-
<
lb
/>
tinued, does not paſsthrough the Eye O, is like-
<
lb
/>
<
note
position
="
right
"
xlink:label
="
note-0023-07
"
xlink:href
="
note-0023-07a
"
xml:space
="
preserve
">Fig. 3.</
note
>
wiſe a right Line: </
s
>
<
s
xml:id
="
echoid-s266
"
xml:space
="
preserve
">For the Rays, by which the
<
lb
/>
Line A B is perceived, form a Plane cutting
<
lb
/>
the perſpective Plane; </
s
>
<
s
xml:id
="
echoid-s267
"
xml:space
="
preserve
">and the common Section
<
lb
/>
of theſe two Planes is a right Line, as a b.</
s
>
<
s
xml:id
="
echoid-s268
"
xml:space
="
preserve
"/>
</
p
>
</
div
>
</
text
>
</
echo
>