## Euler

Eu·ler 1707-83; Swiss mathematician

## euler

Proper noun

- Leonhard Euler, Swiss mathematician and physicist.

- They were accordingly taken up anew by a band of continental inquirers, primarily by three men of untiring energy and vivid genius, Leonhard
**Euler**, Alexis Clairault, and Jean le Rond d'Alembert. **Euler**devised in 1753 a new method, that of the " variation of parameters," for their investigation, and applied it to unravel some of the earth's irregularities in a memoir crowned by the French Academy in 1756; while in 1757, Clairault estimated the masses of the moon and Venus by their respective disturbing effects upon terrestrial movements.**Euler**(Ber., 97, 30, 1989) by distilling the addition compound of methyl iodide and 2 3 5-trimethylpyrollidine with caustic potash.- The inherent difficulties of this task were immensely enhanced by the fact that
**Euler**was virtually blind, and had to carry all the elaborate computations it involved in his memory. - The works which
**Euler**published separately are: Dissertatio physica de sono (Basel, 1727, in 4to); Mechanica, sive motus scientia analytice exposita (St Petersburg, 1736, in 2 vols.

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