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

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1ceratis caret: uerum eorum loco in manibus habent chartam, in qua ſcribunt
quamque inſtrumenti, in poſteriorem perticam impoſiti partem, quam ligu
la, & funiculus extentus, per eius tria foramina penetrans, demonſtrant, &
numeros paſſuum notant: eadem ligula indicat utrum funiculus in priorem
uel poſteriorem partem inclinet. Penſilis autem, ut in libra, non eſt, ſed ad
inſtrumentum affixa, in eo quaſi iacet: ſed cuniculos iccirco metiuntur ut ſci
re poſsint quot paſsibus facti ſint altiores: quot paſſus inferior à ſuperiori
diſtet: quot paſſuum interuallum, nondum perfoſſum, ſit inter foſſores, qui
aduerſi cauant unam eandemque uenam uel fibram tranſuerſam, aut duas, qua
rum altera in alteram uergit.

Inſtrumenti index A. Eius ligula B. Ligulæ foramina C D E.

9[Figure 9]

Sed redeo ad noſtras fodinas. Si menſor intus in cuniculis, uel foſsis laten
tibus uoluerit arearum terminos conſtituere & pangere ſigno in ſaxum inciſo,

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