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habent extremitates inflexas. His au-*tem simul perforetur & coarctetur mi-liarii sedes superior j & per foraminapenetrent alii tubi ad ipsos 7r 0 aptati,in quibus hxc insideant. In uno qui-dem passerculus habens interiora va^cua, ut aquam suscipere postit. Ipseigitur tubus, in quo insidet, inflecti-tur habens phthongarium ex iis, qurefiunt ad transmittendas voces. Inflexioautem usque ad aquam penetret inpasserculo. Quando igitur vox phthon-garii procedit in aquam, vocem me-rula? reddit. Rursus alter tubus habetSc ipse alium tubum sibi coaptatum,in quo insidet animal in eifigiem Tri-tonis efformatum, & in ore buccinanitenens. Rursus autem hic ipse tubus,in quo insidet, habet lingulam & co-dona, ut fieri consuevit. Procedens igi-tur vapor & lingula; &r codoni con-junctus buccina; sonum perficit. Ita-que experientia considerabimus, quan-do foramen respondeat /u 0 tubo, 8Cquando tubo v vr y Sc quando ipsi § im-posito animali. Atque ha;c cognoseen-tes signa qua;dam in ipsis notabimusad clavum xh, ut quando velimus ip-sum buccina canere. Quando rursusvelimus ipsum sufflare, sufflet.Et quan-do velimus, merulae vocem reddat.Quod autem attinet ad craterem, LLad aqua; calidx ascensum, quemad-modum & ante dictum est, ita fiat.

Hydraulici instrumenti constructio.Sit quardam arula aenea a3 y <?, inqua sit aqua, & in aqua concavum he-

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