Heron <Alexandrinus> - Heronis Alexandrini spiritalium liber

Heron <Alexandrinus>, Heronis Alexandrini spiritalium liber

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9892Heronis

81[Figure 81]

Exponatur cylindrus concavus, cujus ſedes quidem inferior ſit AB,
ſuperior vero C D: & alius cylin drus concavus circa eundem axem con-
ſtruatur, cujus ſedes inferior E F, ſuperior G H. Ori autem cylindro-
rum exteriori impoſita ſint diaphragmata quæ poſſint cylindrorum con-
cavitatem claudere & illorum ora obſtruere. Habeat autem E F G H cy-
lindrus tubos O K, L X, M N, quorum L X quidem ſimul perforetur ex
una parte, videlicet ad X: reliqui vero ex utraque parte, ſintque hæc

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