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
="
caption
">
<
s
>
<
pb
pagenum
="
171
"/>
to draw water alone, I will explain how heavy bodies, such as axles, iron
<
lb
/>
chains, pipes, and heavy timbers, should be lowered into deep vertical shafts.
<
lb
/>
</
s
>
<
s
>A windlass is erected whose barrel has on each end four straight levers; it
<
lb
/>
is fixed into upright beams and around it is wound a rope, one end of which
<
lb
/>
is fastened to the barrel and the other to those heavy bodies which are slowly
<
lb
/>
lowered down by workmen; and if these halt at any part of the shaft they
<
lb
/>
are drawn up a little way. </
s
>
<
s
>When these bodies are very heavy, then behind
<
lb
/>
this windlass another is erected just like it, that their combined strength
<
lb
/>
may be equal to the load, and that it may be lowered slowly. </
s
>
<
s
>Sometimes for
<
lb
/>
the same reason, a pulley is fastened with cords to the roof-beam, and the rope
<
lb
/>
descends and ascends over it.</
s
>
</
p
>
<
figure
number
="
95
"/>
<
p
type
="
caption
">
<
s
>A—WINDLASS. B—STRAIGHT LEVERS. C—UPRIGHT BEAMS. D—ROPE. E—PULLEY.
<
lb
/>
F—TIMBERS TO BE LOWERED.</
s
>
</
p
>
<
p
type
="
main
">
<
s
>Water is either hoisted or pumped out of shafts. </
s
>
<
s
>It is hoisted up after
<
lb
/>
being poured into buckets or water-bags; the water-bags are generally
<
lb
/>
brought up by a machine whose water-wheels have double paddles, while the
<
lb
/>
buckets are brought up by the five machines already described, although in
<
lb
/>
certain localities the fourth machine also hauls up water-bags of moderate
<
lb
/>
size. </
s
>
<
s
>Water is drawn up also by chains of dippers, or by suction pumps, or </
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>