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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8777DE MACHINA HYDRAVL. LONDINENSI. MN petitae, deinceps autem comperit, aquam in MN,
ex cylindro H a uapore expulſam, ab eodem calorem
concepiſſe, et ad uaporum condenſationem non ſatis
idoneam eſſe. Quapropter èam ex peculiari recepta-
culo, qua frigida comprehenditur, deriuandam ſuadet.
Et licet fiſtula MN, tantum 18 pedes longa ſit, tamen
non eſt dubitandum, aquas altius aſſurrecturas, ſi cum
aheni magnitudine et ignium copia, uaporum expan-
ſio augeatur. Interim ipſe ingenue mihi faſſus eſt, hanc
machinam anglicana multo inferiorem eſſe, quia ſolo
uapore, pro aquis protrudendis utitur. Interim, quia
parabilior eſt, utilitate et laude ſua minime deſtituetur.

14. Idem etiam formam machinae Londinenſis par-
uam (Modele) ligneam, ſecutus eius delineationem
Londino allatam, perelegantem compoſuit, cuius con-
templatione ſaepius in aedibus Dn. Bosfrandii fui dele-
ctatus. Et utile omnino uidetur prius exiguam eius-
modi machinam componere, antequam ad magni et
pretioſiſſimi operis conſtructionem accedas. Ita enim
fiet, ut fabris nonnullarum partium machinae Londi-
nenſis conformatio, quae menſuris ſolis uix definiri
poteſt, diſtinctius ob oculos et ad imitandum proponi
queat.

15. Vt autem Lector ipſemet, de diſcrimine machi-
nae primum a Sauerio inuentae, et eiusdem recentio-
ris fabricae, iudicare poſſt, inſeram huc quae Har-
risivs in Lexico technico, ſub titulo Engine, retulit.

The other Engine, is for raiſing Water by the force
11Tab. V.
Fig. 1.2.3. of Fire, in which ne (np. Savery) hath ſhewed, as great
Ingenuity, Depth, and Thought, and true mechanick
Skill, as aver diſcovered it ſelf in any deſign of this na-
ture. the deſcription of this Engine is as follows.

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