DAVY, HUMPHREY. - THE RELATION BETWEEN TEMPERATURE AND CONDUCTIVITY DISCOVERED.

Farther researches on the magnetic phaenomena produced by electricity; with some new experiments on the properties of electrified bodies in their relations to conducting powers and temperature. ReadJuly 5, 1821.

(London, W. Bulmer and W. Nicol, 1821). 4to. No wrappers as extracted from "Philosophical Transactions" 1821 - Part II. Pp. 425-439. Clean and fine.

First printing of an importent paper in which Davy announces his discovery that the conductivity of metals varies inversely with temperature. This discovery receives a practical application half a century later when William Siemens uses it to invent the platinum-resistance thermonmeter to measure temperature. - Parkinson "Breakthroughs", 1821 P a. 1971 P.

Order-nr.: 43173