The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 313
Hence cos.- N P T a 1 ^ X -\- pBut in the parabola R ; or cos.3 N P T a {■ix+p)% {■^ x-\-p)h_2 s/p Consequently V a -5 a eos.^ N P T Let « be the normal force at the vertex, and denote by <^ the^/ N P T :—hence, because at the vertex cos. t = 1> f : V : : 1 ; cos. (p .■. v = r cos. i^. Again,… … Assuming the system of points A, B, C, &c. fig. 6, to be in equili-brium, we sliall now imagine the connecting lines to become perfectlyrigid. It is evident that this supposition will not affect the equili-brium, as it does not involve the addition or abstraction oiforce, theonly agent by which…
Architecture · Civil engineering · Science
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