Agricola, Georgius
,
De re metallica
,
1912/1950
Text
Text Image
Image
XML
Thumbnail overview
Document information
None
Concordance
Figures
Thumbnails
Table of figures
<
1 - 30
31 - 60
61 - 90
91 - 120
121 - 150
151 - 180
181 - 210
211 - 240
241 - 270
271 - 300
301 - 312
[out of range]
>
<
1 - 30
31 - 60
61 - 90
91 - 120
121 - 150
151 - 180
181 - 210
211 - 240
241 - 270
271 - 300
301 - 312
[out of range]
>
page
|<
<
of 679
>
>|
<
archimedes
>
<
text
>
<
body
>
<
chap
>
<
p
type
="
main
">
<
s
>
<
pb
pagenum
="
566
"/>
greater part of the water has evaporated. </
s
>
<
s
>The earthy sediment deposited
<
lb
/>
at the bottom of the caldron is composed of fatty and aluminous matter, which
<
lb
/>
usually consists of small incrustations, in which there is not infrequently found
<
lb
/>
a very white and very light powder of asbestos or gypsum. </
s
>
<
s
>The solution now
<
lb
/>
seems to be full of meal. </
s
>
<
s
>Some people instead pour the partly evaporated
<
lb
/>
solution into a vat, so that it may become pure and clear; then pouring it
<
lb
/>
back into the caldron, they boil it again until it becomes mealy. </
s
>
<
s
>By which
<
lb
/>
ever process it has been condensed, it is then poured into a wooden tub
<
lb
/>
sunk into the earth in order to cool it. </
s
>
<
s
>When it becomes cold it is poured
<
lb
/>
into vats, in which are arranged horizontal and vertical twigs, to which the
<
lb
/>
alum clings when it condenses; and thus are made the small white trans
<
lb
/>
parent cubes, which are laid to dry in hot rooms.</
s
>
</
p
>
<
p
type
="
main
">
<
s
>If vitriol forms part of the aluminous ore, the material is dissolved in
<
lb
/>
water without being mixed with urine, but it is necessary to pour that into
<
lb
/>
the clear and pure solution when it is to be re-boiled. </
s
>
<
s
>This separates the
<
lb
/>
vitriol from the alum, for by this method the latter sinks to the bottom of the
<
lb
/>
caldron, while the former floats on the top; both must be poured separately
<
lb
/>
into smaller vessels, and from these into vats to condense. </
s
>
<
s
>If, however, when
<
lb
/>
the solution was re-boiled they did not separate, then they must be poured
<
lb
/>
from the smaller vessels into larger vessels and covered over; then the vitriol
<
lb
/>
separating from the alum, it condenses. </
s
>
<
s
>Both are cut out and put to dry in
<
lb
/>
the hot room, and are ready to be sold; the solution which did not congeal in </
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
>