Agricola, Georg
,
De re metallica Libri XII, Quibus Officia, Instrumenta, Machinae, ac omnia ...
,
1556
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<
text
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body
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<
chap
id
="
N10018
">
<
pb
pagenum
="
376
"
xlink:href
="
001/01/386.jpg
"/>
<
p
id
="
N1C465
"
type
="
main
">
<
s
id
="
N1C467
">Sed iam tempus eſt ut ad ſecundam operam ueniamus. </
s
>
<
s
id
="
N1C46A
">Mane artifex pri
<
lb
/>
mò accipiens batilla prunarum duo, ea inijcit in catinum iuxta fiſtulas nari
<
lb
/>
um per foramen: deinde per idem foramen imponit ligna abiegna uel picea
<
lb
/>
ſtri parua, qualia
<
expan
abbr
="
ſolẽt
">ſolent</
expan
>
ea eſſe, quibus piſces coquimus: tum machinæ, depri
<
lb
/>
mentis tigilla follium, fores attollit ut uerſari poſſit: atque ita ſpacio unius ho
<
lb
/>
ræ plumbum miſtum liqueſcit: quod cùm factum fuerit quatuor ligna, lon
<
lb
/>
ga pedes duodecim, per poſtremum operculi foramen imponit, & totidem
<
lb
/>
per canaliculum: quæ ligna, ne catinum uitient, premendo utrinque ſuſtinent
<
lb
/>
ſcamna: ea ſunt tigna longa pedes tres, lata palmos duos et totidem digitos,
<
lb
/>
craſſa palmos duos: quibus utrinque ſunt duo pedes diuaricati. </
s
>
<
s
id
="
N1C483
">Ad
<
expan
abbr
="
ſcamnũ
">ſcamnum</
expan
>
<
lb
/>
præterea ante canaliculum locatum apponit laminam ferream, ne ſpuma ar
<
lb
/>
genti, cùm ipſam ex catino extrahit, ei in calceos inſiliat, pedesque & crura of
<
lb
/>
fendat: quinetiam reliquos panes batillo uel furca ferrea lignis iam dictis im
<
lb
/>
ponit per poſtremum operculi foramen. </
s
>
<
s
id
="
N1C492
">At argentum rude purum, aut
<
lb
/>
plumbei coloris uel cinerei, uel rubri, uel denique alterius dilatatum & conci
<
lb
/>
ſum atque calefactum in catinis ferreis, tunc in liquidum plumbum, cui argen
<
lb
/>
tum immiſtum eſt, quod, ut ſæpius dixi, nominatur ſtannum, infunditur: ac
<
lb
/>
ſic quod impurum eſt, ab eo ſeparatur. </
s
>
<
s
id
="
N1C49D
">Verùm cùm ligna oblonga priore
<
lb
/>
parte fuerint
<
expan
abbr
="
cõbuſta
">combuſta</
expan
>
, tum cuneos ferreos longos pedes quatuor, priore par
<
lb
/>
te latos digitos duos, deinde ſeſquidigitum latos & craſſos, magiſter mal
<
lb
/>
leo in ea impellit, atque ipſis promouet: iacent uerò cunei in ſcamnis. </
s
>
<
s
id
="
N1C4AA
">At alij
<
lb
/>
cùm ſeparant metalla, duo eiuſmodi ligna
<
expan
abbr
="
imponũt
">imponunt</
expan
>
in
<
expan
abbr
="
catinũ
">catinum</
expan
>
per foramen,
<
lb
/>
quod eſt inter folles: totidem per poſtremum foramen, unum per canalicu
<
lb
/>
lum: ſed his maiore lignorum numero, nempe ſexaginta, opus eſt: cùm illi li
<
lb
/>
gnis quadraginta operam perficere poſſint. </
s
>
<
s
id
="
N1C4BD
">Cùm uerò plumbum duabus
<
lb
/>
horis ita fuerit calefactum, tum id ipſum
<
expan
abbr
="
cõmouet
">commouet</
expan
>
conto uncinato, ut magis
<
lb
/>
calefiat. </
s
>
<
s
id
="
N1C4C8
">Quod ſi difficulter ſeparatur ab argento, in ſtannum
<
expan
abbr
="
liquefactũ
">liquefactum</
expan
>
in
<
lb
/>
ijcit æs & puluerem carbonum. </
s
>
<
s
id
="
N1C4D1
">Si uerò miſtura auri argentoſi cum plum
<
lb
/>
bo uel ſtannum ex uena contraxit impurum quiddam, in id inijcit portio
<
lb
/>
nes, aut pares, uel ergo aridæ uini fecis & uitri Veneti, ſiue ſalis ammoniaci,
<
lb
/>
uel uitri Veneti, & ſaponis
<
expan
abbr
="
itẽ
">item</
expan
>
Veneti: aut impares, nempe aridæ uini fecis
<
lb
/>
duas, ferruginis unam. </
s
>
<
s
id
="
N1C4E0
">Sunt qui ſingulis compoſitionibus admiſcent halini
<
lb
/>
tri particulam. </
s
>
<
s
id
="
N1C4E5
">Ad miſturæ autem centumpondium adijcitur pulueris bes,
<
lb
/>
aut libra, aut libra & triens: prout magis uel minus impura fuerit. </
s
>
<
s
id
="
N1C4EA
">Puluis cer
<
lb
/>
te id, quod
<
expan
abbr
="
impurũ
">impurum</
expan
>
eſt, ab ipſa miſtura ſeparat. </
s
>
<
s
id
="
N1C4F3
">Tunc uerò plumbi, cum car
<
lb
/>
bonibus permiſti, quaſi cutem
<
expan
abbr
="
quandã
">quandam</
expan
>
rutro per canaliculum extrahit: eam
<
lb
/>
plumbum cùm calefit, gignit, ſed ut minus multam gignat, conto
<
expan
abbr
="
fre〈quẽ〉ter
">frequenter</
expan
>
<
lb
/>
<
expan
abbr
="
cõmouendum
">commouendum</
expan
>
eſt: deinde ad horæ partis quartæ ſpacium catinus combibit
<
lb
/>
plumbum. </
s
>
<
s
id
="
N1C509
">Eo autem tempore, quo penetrat in ipſum, ſalit & bullit: tum ma
<
lb
/>
giſter cochleari ferreo haurit paucum plumbum, quod experitur atque ex eo
<
lb
/>
cognoſcit, quanta argenti portio in ea miſtura tota inſit. </
s
>
<
s
id
="
N1C510
">Cochleare uerò la
<
lb
/>
tum eſt digitos quinque: eius manubrij pars ferrea
<
expan
abbr
="
lõga
">longa</
expan
>
eſt pedes tres, lignea
<
lb
/>
totidem. </
s
>
<
s
id
="
N1C51B
">Poſtea conto extrahit ſpumam argenti: quæ fit ex plumbo & ære,
<
lb
/>
ſi id quoque inerit in miſtura, uſtis: quare rectius ſpuma plumbi quàm argen
<
lb
/>
ti diceretur. </
s
>
<
s
id
="
N1C522
">Etenim uitium argenti tunc nullum eſt, ſed plumbum & æs ab </
s
>
</
p
>
</
chap
>
</
body
>
</
text
>
</
archimedes
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