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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SCHOLION.
ן a + c = a2 + 2 a c + c2, et
ן b + d = b2 + 2 b d + d2
ן x + y = x2 + 2 x y + yy (§. 34. Analyſ. finit.)
et per theor. pyth.
a2 + b2 = x2
et c2 + d2 = y y
V a2 + b2 = x
V c2 + d2 = y
et ſecundum bypotheſin praecepti voigteliani foret
a2 + 2 a c + c2 + b2 + 2 b d + d2 = x2 + 2xy + yy
a2 + 2 a c + c2 + b2 + 2bd + d2 = a2 + b2 + 2xy + c2 + d2

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