Henry Cavendish 2In existographies, Henry Cavendish (1731-1810) (IQ:170|#335) [RGM:514|1,500+] (Murray 4000:6|P) (Murray 4000:6|P) (Kanowitz 50:18) (GCE:9) (GPE:23) (CR:14) was an English experimental physicist, theoretical chemist, and natural philosopher, noted for []

In 1766, Cavendish, in his On Factitious Airs, presented his discover of the hydrogen, which he terms “inflammable air”; the following is the experimental device he used:
Cavendish hydrogen experiment


In c.1775, did a number of experiments on heat, publishing a number of articles and papers, in which he, supposedly, rejected the fluid theory of heat, and in its place, attempted to formulate a so-called "mechanical theory of heat". [1] Cavendish also did work on latent heat and specific heat.

Gravitational constant
In 1798, Cavendish, determined, via experiment (Ѻ), the first measurement of Newton’s gravitational constant, using the following device:

Cavandish experiment

The calculated value was found to be accurate to 1% of modern value.

Was the first to determine the electrical conductivity of salt solutions and experimentally proved the inverse square law.

Quotes | On
The following are quotes on Cavendish:

“Blagden, in his obituary on Cavendish (Mar 1810), failed to mention Cavendish's work on heat, although he made note of all of his other major work. Odd, I say, because in none of his other work was Cavendish known to have declared himself publicly a more decided follower of Newton, according to his understanding of Newton, than in his work on heat, and also because Blagden assisted Cavendish in this work. If there is a circumstance that might bear on Blagden's neglect or forgetfulness in his obituary of his late friend and colleague, it is that Blagden subscribed to the popular ‘material theory of heat’, of which Cavendish held a low, almost contemptuous, opinion.”
— Russell McCormmach (1988), “Henry Cavendish on the Theory of Heat” [2]

1. (a) McCormmach, Russell. (2004). Speculative Truth: Henry Cavendish, Natural Philosophy, and the Rise of Modern Theoretical Science (pgs. 123-24). Oxford University Press.
(b) Cavendish, Henry. (2011). The Scientific Papers of the Honourable Henry Cavendish, F.R.S. (Cavendish Papers on Heat, pgs. 326-89). Cambridge University Press.
(c) McCormmach, Russell. (1988). “Henry Cavendish on the Theory of Heat” (abs), Isis, 79(1): 37-67.
2. McCormmach, Russell. (1988). “Henry Cavendish on the Theory of Heat” (abs), Isis, 79(1): 37-67.

External links
Henry Cavendish – Wikipedia.

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