Salusbury, Thomas
,
Mathematical collections and translations (Tome I)
,
1667
Text
Text Image
Image
XML
Thumbnail overview
Document information
None
Concordance
Figures
Thumbnails
Page concordance
<
1 - 30
31 - 60
61 - 90
91 - 120
121 - 150
151 - 180
181 - 210
211 - 240
241 - 270
271 - 300
301 - 330
331 - 360
361 - 390
391 - 420
421 - 450
451 - 480
481 - 510
511 - 540
541 - 570
571 - 600
601 - 630
631 - 660
661 - 690
691 - 701
>
Scan
Original
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
<
1 - 30
31 - 60
61 - 90
91 - 120
121 - 150
151 - 180
181 - 210
211 - 240
241 - 270
271 - 300
301 - 330
331 - 360
361 - 390
391 - 420
421 - 450
451 - 480
481 - 510
511 - 540
541 - 570
571 - 600
601 - 630
631 - 660
661 - 690
691 - 701
>
page
|<
<
of 701
>
>|
<
archimedes
>
<
text
>
<
body
>
<
chap
>
<
p
type
="
main
">
<
s
>
<
pb
xlink:href
="
040/01/175.jpg
"
pagenum
="
157
"/>
ball ſuſpend it ſelf in its range directly over the Piece. </
s
>
<
s
>And in a
<
lb
/>
word, if you do but attentively conſider, you will comprehend,
<
lb
/>
that the motion of the Earth in transferring the Piece along with
<
lb
/>
it from C A to E D, conferreth upon the tranſverſe line C D, ſo
<
lb
/>
much of little or great inclination, as is required to adjuſt the
<
lb
/>
range to its perpendicularity. </
s
>
<
s
>But you err, ſecondly, in that you
<
lb
/>
referr the faculty of carrying the ball along with the Earth to the
<
lb
/>
impulſe of the fire, and you run into the ſame error, into which
<
lb
/>
<
emph
type
="
italics
"/>
Salviatus,
<
emph.end
type
="
italics
"/>
but even now ſeemed to have fallen; for the faculty
<
lb
/>
of following the motion of the Earth, is the primary and perpetual
<
lb
/>
motion, indelibly and inſeparably imparted to the ſaid ball, as to a
<
lb
/>
thing terreſtrial, and that of its own nature doth and ever ſhall
<
lb
/>
poſſeſs the ſame.</
s
>
</
p
>
<
p
type
="
main
">
<
s
>SALV. </
s
>
<
s
>Let us yield,
<
emph
type
="
italics
"/>
Simplicius,
<
emph.end
type
="
italics
"/>
for the buſineſs is juſt as he
<
lb
/>
<
arrow.to.target
n
="
marg347
"/>
<
lb
/>
ſaith. </
s
>
<
s
>And now from this diſcourſe let us come to underſtand the
<
lb
/>
reaſon of a Venatorian Problem, of thoſe Fowlers who with their
<
lb
/>
guns ſhoot a bird flying; and becauſe I did imagine, that in regard
<
lb
/>
the bird flieth a great pace, therefore they ſhould aim their ſhot far
<
lb
/>
from the bird, anticipating its flight for a certain ſpace, and more
<
lb
/>
or leſs according to its velocity and the diſtance of the bird, that
<
lb
/>
ſo the bullet haſting directly to the mark aimed at, it might come
<
lb
/>
to arrive at the ſelf ſame time in the ſame point with its motion,
<
lb
/>
and the bird with its flight, and by that means one to encounter
<
lb
/>
the other: and asking one of them, if their practiſe was not ſo
<
lb
/>
to do; He told me, no; but that the ſlight was very eaſie and
<
lb
/>
certain, and that they took aim juſt in the ſame manner as if they
<
lb
/>
had ſhot at a bird that did ſit ſtill; that is, they made the flying
<
lb
/>
bird their mark, and by moving their fowling-piece they followed
<
lb
/>
her, keeping their aim ſtill full upon her, till ſuch time as they let
<
lb
/>
fly, and in this manner ſhot her as they did others ſitting ſtill. </
s
>
<
s
>It is
<
lb
/>
neceſſary therefore that that motion, though ſlow, which the
<
lb
/>
ing-piece maketh in turning and following after the flight of the
<
lb
/>
bird do communicate it ſelf to the bullet alſo, and that it be joyned
<
lb
/>
with that of the fire; ſo that the ball hath from the fire the
<
lb
/>
tion directly upwards, and from the concave Cylinder of the barrel
<
lb
/>
the declination according to the flight of the Bird, juſt as was ſaid
<
lb
/>
before of the ſhot of a Canon; where the ball receiveth from the
<
lb
/>
fire a virtue of mounting upwards towards the Zenith, and from
<
lb
/>
the motion of the Earth its winding towards the Eaſt, and of both
<
lb
/>
maketh a compound motion that followeth the courſe of the
<
lb
/>
Earth, and that to the beholder ſeemeth onely to go directly
<
lb
/>
wards, and return again downwards by the ſame line. </
s
>
<
s
>The
<
lb
/>
ing therefore of the gun continually directed towards the mark,
<
lb
/>
maketh the ſhoot hit right, and that you may keep your gun
<
lb
/>
rected to the mark, in caſe the mark ſtands ſtill, you muſt alſo hold </
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>