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1. A MACHINE a combination of timbers fastened together, chiefly efficacious in moving great weights. Such a machine is set in motion on scientific principles in circular rounds, which the Greeks call κυκλικὴ κίνησις There is, however, a class intended for climbing, termed in Greek ἀκροβατικόν another worked by air, which with them is called πνευματικόν and a third for hoisting; this the Greeks named βαπουλκόςIn the climbing class are machines so disposed that one can safely climb up high, by means of timbers set up on end and connected by crossbeams, in order to view operations. In the pneumatic class, air is forced by pressure to produce sounds and tones as in an ὄπγαϝοϝ.

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