Heron <Alexandrinus>, Heronis Alexandrini spiritalium liber

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115109THEOREMATA SPIRITALIA. cujus diameter ſit cavus, & ſuperficies exterior ejus dividatur in tres
partes, lineis notatas, deinde, è regione ferramentorum infixorum
cylindris T V X, in iſto fuſo ſint alia totidem ferramenta habentia
90[Figure 90] formam 11 utin CC notavimus, quæ in tantum extra fuſum promineant,
ut, dum fuſus circumvolvitur, extollant unam extremitatem ferramento-
rum infixorum cylindris Z, &
notatis 3. 4. ſed ſi elevent ferramentum 3.
capiti 4. alligati ſint funes, qui tranſeuntes per crura fabrorum, facient
ut hi brachia ſua elevent, &
in incudem feriant. Poſtea fuſo adaptetur rota
5.
6. 7. 8. in qua ſint diſpertita ſpacia, ut figura demonſtrat, ibique in-
terſerantur diaphragmata, ut ſequens figura + demonſtrat, ita torta, ut
aquam poſſint retinere.
Poſtea fiat, ut crux, quæ debet tenere

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