Jonathan Hornblower

In existographies, Jonathan Hornblower (1753-1815) (EP:33) was British engineer, noted for []

In 1781, Hornblower invented a “compound steam engine”, which had two cylinders instead of one single acting cylinder.

In 1792, James Watt took Hornblower to court over intellectual property issues; Hornblower eventually lost and later became an astronomer. During the course of the court hearings, however, Hornblower called on the aid of his friend and advisor Davies Gilbert, who, in court, is said to have employed some type of Newton-based integral calculus method to calculate the work done by the Hornblower engine, that has been conjectured to have been something formally similar to something that Daniel Bernoulli, in his Hydrodynamica (1738), had done, and which acted to spur on the invention of the “indicator diagram” by John Southern in 1796.

Jonathan Hornblower, brother of Jabez Hornblower (dates), son of Jonathan Hornblower (dates), who was himself the older brother of Josiah Hornblower (1729-), both of whose father was Joseph Hornblower (1696-), an early builder of Newcomen engines in Cornwall. [1]

1. Lienhard, John H. (2005). “Five Hornblowers” (Ѻ), Engines of Ingenuity, #2015, University of Houston.
2. (a) Bernoulli, Danile. (1738). Hydrodynamica (§10:200-204). Strasbourgh.
(b) Pacey, A.J.; Fisher, S.J. (1967). “Daniel Bernoulli and the Vis-Viva of Compressed Air” (abs), British Journal for the History of Science, 3(4)::388-92.
(c) Cardwell, Donald S.L. (1971). From Watt to Clausius: the Rise of Thermodynamics in the Early Industrial Age (pgs. 79-80). Cornell University Press.

External links
Jonathan Hornblower – Wikipedia.

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