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
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
<
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
="
161
"/>
which they unload separately and crush and wash. </
s
>
<
s
>When they draw up
<
lb
/>
buckets of water they empty the water through the hopper into a trough,
<
lb
/>
through which it flows away.</
s
>
</
p
>
<
figure
number
="
88
"/>
<
p
type
="
caption
">
<
s
>A—TIMBER PLACED IN FRONT OF THE SHAFT. B—TIMBER PLACED AT THE BACK OF THE
<
lb
/>
SHAFT. C—POINTED STAKES. D—CROSS-TIMBERS. E—POSTS OR THICK PLANKS.
<
lb
/>
F—IRON SOCKETS. G—BARREL. H—ENDS OF BARREL. I—PIECES OF WOOD.
<
lb
/>
K—HANDLE. L—DRAWING-ROPE. M—ITS HOOK. N—BUCKET. O—BALE OF THE
<
lb
/>
BUCKET.</
s
>
</
p
>
<
p
type
="
main
">
<
s
>The next kind of machine, which miners employ when the shaft is
<
lb
/>
deeper, differs from the first in that it possesses a wheel as well as cranks.
<
lb
/>
</
s
>
<
s
>This windlass, if the load is not being drawn up from a great depth, is turned
<
lb
/>
by one windlass man, the wheel taking the place of the other man. </
s
>
<
s
>But if the
<
lb
/>
depth is greater, then the windlass is turned by three men, the wheel being
<
lb
/>
substituted for a fourth, because the barrel having been once set in motion,
<
lb
/>
the rapid revolutions of the wheel help, and it can be turned more easily.
<
lb
/>
</
s
>
<
s
>Sometimes masses of lead are hung on to this wheel, or are fastened to the
<
lb
/>
spokes, in order that when it is turned they depress the spokes by their weight
<
lb
/>
and increase the motion; some persons for the same reason fasten into the
<
lb
/>
barrel two, three, or four iron rods, and weight their ends with lumps of lead.
<
lb
/>
</
s
>
<
s
>The windlass wheel differs from the wheel of a carriage and from the one </
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>