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
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
<
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
="
322
"/>
contains grains of it, are washed in frames or bowls; the sands especially
<
lb
/>
are also washed in troughs. </
s
>
<
s
>More than one method is employed for washing
<
lb
/>
on frames, for these frames either pass or retain the particles or concentrates
<
lb
/>
of gold; they pass them if they have holes, and retain them if they have
<
lb
/>
no holes. </
s
>
<
s
>But either the frame itself has holes, or a box is substituted for
<
lb
/>
it; if the frame itself is perforated it passes the particles or concentrates
<
lb
/>
of gold into a trough; if the box has them, it passes the gold material into
<
lb
/>
the long sluice. </
s
>
<
s
>I will first speak of these two methods of washing. </
s
>
<
s
>The
<
lb
/>
frame is made of two planks joined together, and is twelve feet long and
<
lb
/>
three feet wide, and is full of holes large enough for a pea to pass. </
s
>
<
s
>To prevent
<
lb
/>
the ore or sand with which the gold is mixed from falling out at the sides,
<
lb
/>
small projecting edge-boards are fixed to it. </
s
>
<
s
>This frame is set upon two
<
lb
/>
stools, the first of which is higher than the second, in order that the gravel
<
lb
/>
and small stones can roll down it. </
s
>
<
s
>The washer throws the ore or sand into
<
lb
/>
the head of the frame, which is higher, and opening the small launder, lets
<
lb
/>
the water into it, and then agitates it with a wooden scrubber. </
s
>
<
s
>In this way,
<
lb
/>
the gravel and small stones roll down the frame on to the ground, while the </
s
>
</
p
>
<
figure
number
="
180
"/>
<
p
type
="
caption
">
<
s
>A—HEAD OF FRAME. B—FRAME. C—HOLES. D—EDGE-BOARDS. E—STOOLS
<
lb
/>
F—SCRUBBER. G—TROUGH. H—LAUNDER. I—BOWL.</
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>