Bernoulli's discovery was one of the great moments in the history of science, for his extraordinary insights laid the foundations for the kinetic theory of gases, which in the 19th century fully validated his profound understanding of the nature of gases.
Bernoulli experimented by puncturing the wall of a pipe with a small, open-ended straw, and noted that as the fluid passed through the tube the height to which the fluid rose up the straw was related to fluid's pressure.
Born as the son of JohannBernoulli, nephew of Jakob Bernoulli, younger brother of Nicolaus BernoulliII, and older brother of JohannII, DanielBernoulli was by far the ablest of the younger Bernoullis.
Bernoulli shows how the calculus was developed to solve certain physical-mechanical problems, such as determining the path of least-time and equal time, or the shape of the hanging chain.
Bernoulli's treatment is found in a German translation of his 1691 "Lectures on the Integral calculus".
Bernoulli shows that the shape of the hanging chain, which Huygens called the catenary curve, is that path that must be followed, so as to maintain an equal force on this lowest point.
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