Weidler, Johann Friedrich - Jo. Friderici Weidleri Tractatus de machinis hydraulicis toto terrarum orbe maximis Marlyensi et Londinensi et aliis rarioribus similibus in quo mensurae prope ipsas machinas notatae describuntur, et de viribus earum luculenter disseritur

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7060CAPVT IV.

l. A Windleſſ, Axis, and Rope, whereby men and
materials are conveyed up and down the mine.

m, m. A Pipe which by the little Pump k ſupplies
the Ciſtern g with Water.

ppp the ground Floor before the Fireplace.

q. Steps going down to the fire place.

r. A Pipe conveying the waſte Water from the
Ciſtern g.

Interpretatio latina earundem obſerua-
tionum.

A. Fornax.

B. Ahenum magnum, cuius duae partes tertiae a-
quis repletae ſunt, in quo uapor concluditur operculo
ſphaerico, ut conſimilem ſemper extenſionem con-
ſeruet.

C. Cylindrus aeneus, cuius diameter amplior con-
tractiorque eſt, pro ratione profunditatis et copiae a-
quarum extollendarum, ita ut preſſus aeris columnam
aqueam uelocitate debita propellat.

D. Fiſtula per quam uapor ex aheno cylindrum C
ingreditur.

E. Axis rectoris, ſiue epiſtomii, quod aperit et oc-
cludit os fiſtulae D intra ahenum. Quo ipſo mode-
ratur motum totius machinae@@um efficit, ut exhalatio
aquae diffundat ſeſe, et embolus in cylindro C aſcen-
dit; iterumque cohibito uapore, permittit, ut iniectu
aquae frigidae uapor ſubito condenſatus Vacuum ſpa-
tium producat, ut embolus aeris pondere oneratus,
celerrime delabatur.

F. Valuula plumbea, quaepatitur, ut uapor ex ahe-
no erumpat, quando ibidem abundat.

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