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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
<
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
="
caption
">
<
s
>
<
pb
pagenum
="
139
"/>
the major spaces on the rod, and those which proceed further, mark the
<
lb
/>
middle of the intervening space which lies between the others. </
s
>
<
s
>The
<
lb
/>
straight lines, which run from the fifth to the sixth semi-circular line, show
<
lb
/>
nothing further. </
s
>
<
s
>Nor does the line which measures the half, show anything
<
lb
/>
when it has already passed from the sixth straight line to the base of the
<
lb
/>
hemicycle. </
s
>
<
s
>When the hemicycle is applied to the cord, if its tongue indicates
<
lb
/>
the sixth straight line which lies between the second and third semi-circular
<
lb
/>
lines, the surveyor counts on the rod six lines which separate the minor
<
lb
/>
spaces, and if the length of this portion of the rod be taken from the second
<
lb
/>
cord, as many times as the cord itself is half-fathoms long, the remaining
<
lb
/>
length of cord shows the distance the tunnel must be driven to reach under
<
lb
/>
the shaft. </
s
>
<
s
>But if he sees that the tongue has gone so far that it marks the
<
lb
/>
sixth line between the fourth and fifth semi-circular lines, he counts six lines
<
lb
/>
which separate the major spaces on the rod; and this entire space is deducted
<
lb
/>
from the length of the second cord, as many times as the number of whole
<
lb
/>
fathoms which the cord contains; and then, in like manner, the remaining
<
lb
/>
length of cord shows us the distance the tunnel must be driven to reach
<
lb
/>
under the shaft.
<
emph
type
="
sup
"/>
19
<
emph.end
type
="
sup
"/>
</
s
>
</
p
>
<
figure
number
="
68
"/>
<
p
type
="
caption
">
<
s
>STRETCHED CORDS: A—FIRST CORD. B—SECOND CORD. C—THIRD CORD.
<
lb
/>
D—TRIANGLE.</
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>