Agricola, Georg, De re metallica Libri XII, Quibus Officia, Instrumenta, Machinae, ac omnia ..., 1556

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1
Rota cuius pinnas impetus riui percurrit A. Axis B. Eius tympanum
in quod fibulæ ſunt infixæ C. Catena D. Annulus E.
Situlæ F. Libramentum G.
31[Figure 31]
Verùm de primo machinarum genere ſatis: nunc alterum, hoc eſt ſipho­
nes aquam ſpiritu tractam orbiculis haurientes exponam: quorum ſeptem
ſunt formæ: quæ licet ſtructura inter ſe differant, tamen eundem utilitatis fru­
ctum metallicis præbent: quanquam alia alia maiorem.
Primus ſypho ſic fit.
Super lacunam ſtatuitur contignatio: ad quam fiſtula una uel duæ, quarum
altera in altera incluſa eſt, in lacunæ fundum immiſſæ fibulis ferreis cuſpida
tis & utrinque directò deorſum uerſus actis affiguntur, ut immotæ maneant:
inferioris autem fiſtulæ inferior pars incluſa eſt in trunco, alto ad duos pe­
des: is fiſtulæ inſtar perforatus ſtat in fundo lacunæ: ſed inferius eius fora­
men ligno tereti occluditur: idem truncus circum circa habet foramina, per
quæ aqua in ipſum manat.
In ſuperiore uerò eius parte excauata, ſi una fiſtu
la fuerit, pyxis ferrea, uel ærea, uel orichalcea, palmum alta, ſed fundo carens,
includitur: quam foricula rotunda tam arctè claudit, ut aqua ſurſum ſpiritu
ducta relabi non poſsit: ſin duæ fiſtulæ fuerint, qua coniunguntur pyxis in
inferiore includitur, ſuperioris apertura uel ſiphunculus ad cuniculi canales
pertingit.
Itaque operarius impiger ad labores, in contignationis tabulato

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