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

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1per ſuperiora tigna tranſuerſaria, altera ſuper inferiora: utraque tam longa
eſt, ut ferè ex machinæ tympano uſque ad puteum pertineat.
Vtrique prope i­
dem tympanum axiculus ligneus eſt teres & craſſus digitos ſex, cuius capi­
tula, lamellis ferrata, uerſantur in armillis ferreis: utrique ſunt orbiculi lignei,
qui unà cum axiculis ſuis ferreis uoluuntur in earundem trabium foramini­
bus: atque hi orbiculi circuncirca ſunt excauati, ut funis ductarius ex ipſis exci­
dere non poſsit: itaque uterque funis per ſuum axiculum ſuoſque orbiculos ex­
tenſus uerſatur: utriuſque uncus ferreus uaſis ſemicirculo inijcitur: utrique præ
terea capiti alterius inferioris tigni duplicati, quod eſt in axe incluſum, eſt ti
gillum longum pedes quatuor: id quaſi ex duplicato pendet: cui inferius ti
gnum curtum eſt incluſum, in quo auriga ſedet: quodque ferreum habet cla­
uum, qui recipit catenam, atque ea rurſus ſtateram.
Quo modo fieri poteſt ut
duo equi hanc machinam modo hac, modo illac trahant: uiciſsimque uas alte
rum onere plenum ex puteo extrahatur, alterum uacuum in eundem demit
tatur.
Si uerò puteus fuerit profundus, quatuor equi machinam circuma­
gunt.
Vaſi autem extracto, ſiue ſiccæ ſiue humidæ res effundendæ fue
rint, operarius harpagonem inijcit, ipſumque ſubuertit:
is ex catena, cui tres uel quatuor annuli ſunt,
ad trabem affixa, dependet.
Tigna erecta A. Tigna humi ſtrata B. Tigna oblique de­
ſcendentia C. Area D. Tignum in imo crateris ſtra­
tum E. Axis F. Tigna tranſuerſaria duplicata G.
Tympanum H. Ductarij funes I. Vas K. Tigillum ex
duplicato pendens L. Tignum curtum M.
Catena N. Statera O. Harpago P.

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