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

Table of contents

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[101.] PROBLEMA XI.
[102.] CONSECTARIVM.
[103.] PROBLEMA XII.
[104.] CONSECTARIVM I.
[105.] SCHOLION.
[106.] CONSECTARIVM II.
[107.] CONSECTARIVM III.
[108.] SCHOLION.
[109.] PROBLEMA XIII.
[110.] SCHOLION I.
[111.] SCHOLION II.
[112.] DEFINITIO XX.
[113.] DEFINITIO XXI.
[114.] SCHOLION I.
[115.] SCHOLION II.
[116.] SCHOLION III.
[117.] DEFINITIO XXII.
[118.] DEFINITIO XXIII.
[119.] DEFINITIO XXIV.
[120.] CONSECTARIVM.
[121.] SCHOLION.
[122.] PROBLEMA XIV.
[123.] CONSECTARIVM.
[124.] PROBLEMA XV.
[125.] SCHOLION I.
[126.] SCHOLION II.
[127.] DEFINITIO XXV.
[128.] PROBLEMA XVI.
[129.] DEFINITIO XXVI.
[130.] SCHOLION.
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124
PRAEFATIO.
Ad artes inueniendas et ampliſi-
candas, nulla re magis, quam
ſpe utilitatis, animi mortalium
inflammantur.
Teſtis aegyptus,
in qua nili inundationes geome-
triam pepererunt.
Et in germa-
nia, poſtquam abditae olim omnis generis metallorum
uenae, abbinc pluribus ſeculis detectae et perueſtiga-
tae ſunt, occaſio ſuppeditata eſt, geometriam ad
ſpecus ſubterraneos metiendos accommodandi.
Haec ars etiamſi inter noſtros foſſores egregie flore-
at, tamen cum, ob faſtidia et pericula, quibus ſtipa-
ta eſt, plerumqne tantum tractetur a pragmaticis,
mathematicarum ſcientiarum minus gnaris, et pro-
pterea ab ipſis obſcurius nec ſolide ſatis tradatur,
feci periculum, eiusdem paulo accuratius formandae
et ex purae matheſeos principiis demonſtrandae.

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