Agricola, Georgius
,
De re metallica
,
1912/1950
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 - 679
>
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 - 679
>
page
|<
<
of 679
>
>|
<
archimedes
>
<
text
>
<
body
>
<
chap
>
<
p
type
="
main
">
<
s
>
<
pb
pagenum
="
136
"/>
ninety-five fathoms deep, the last will reach the bottom of the tunnel when
<
lb
/>
it is sunk a further depth of five fathoms.</
s
>
</
p
>
<
figure
number
="
64
"/>
<
p
type
="
caption
">
<
s
>A TRIANGLE HAVING ALL ITS ANGLES ACUTE AND ITS THREE SIDES EQUAL.</
s
>
</
p
>
<
p
type
="
main
">
<
s
>If a triangle is made which has all its angles acute, but only two sides
<
lb
/>
equal, namely, the first and third, then the second and third sides are not
<
lb
/>
equal; therefore the distances to be dug cannot be equal. </
s
>
<
s
>For example, if
<
lb
/>
the first side of the minor triangle is six feet long, and the second is four feet,
<
lb
/>
and the third is six feet, and the cord measurement for the side of the major
<
lb
/>
triangle is one hundred and one times six feet, that is, one hundred and one
<
lb
/>
fathoms, then the distance between the mouth of the tunnel and the bottom of
<
lb
/>
the last shaft will be sixty-six fathoms and four feet. </
s
>
<
s
>But the distance from the
<
lb
/>
mouth of the first shaft to the bottom of the tunnel is one hundred fathoms.
<
lb
/>
</
s
>
<
s
>So if the tunnel is sixty fathoms long, the remaining distance to be driven
<
lb
/>
into the mountain is six fathoms and four feet. </
s
>
<
s
>If the shaft is ninety-seven
<
lb
/>
fathoms deep, the last one will reach the bottom of the tunnel when a further
<
lb
/>
depth of three fathoms has been sunk.</
s
>
</
p
>
<
figure
number
="
65
"/>
<
p
type
="
caption
">
<
s
>TRIANGLE HAVING ALL ITS ANGLES ACUTE AND TWO SIDES EQUAL, A, B, UNEQUAL SIDE C.</
s
>
</
p
>
<
p
type
="
main
">
<
s
>If a minor triangle is produced which has all its angles acute, but its
<
lb
/>
three sides unequal, then again the distances to be dug cannot be equal.
<
lb
/>
</
s
>
<
s
>For example, if the first side of the minor triangle is seven feet long, the
<
lb
/>
second side is four feet, and the third side is six feet, and the cord measureĀ
<
lb
/>
ment for the side of the major triangle is one hundred and one times seven
<
lb
/>
feet or one hundred and seventeen fathoms and four feet, the distance
<
lb
/>
between the mouth of the tunnel and the bottom of the last shaft will be
<
lb
/>
four hundred feet or sixty-six fathoms, and the depth between the mouth of
<
lb
/>
the first shaft and the bottom of the tunnel will be one hundred fathoms.
<
lb
/>
</
s
>
<
s
>Therefore, if a tunnel is fifty fathoms long, it will reach the middle of the
<
lb
/>
bottom of the newest shaft when it has been driven sixteen fathoms and four
<
lb
/>
feet further. </
s
>
<
s
>But if the shafts are then ninety-two fathoms deep, the last </
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>