‎KIRCHHOFF (G.)‎
‎RECHERCHES SUR LE SPECTRE SOLAIRE ET SUR LES SPECTRES DES CORPS SIMPLES traduit de l'allemand par M. L. Grandeau, pp. 5/48 -- SUR LE PRINCIPE DE L'EGALISTE DES POUVOIRS EMISSIFS ET ABSORBANTS pp. 184/185 ---- Soit DEUX MEMOIRES ORIGINAUX DE G. KIRCHHOFF in Annales de chimie et physique, tome 68‎

‎P., Masson, 1863, un volume in 8, broché‎

Reference : 2915

‎---- EDITIONS ORIGINALES ---- "Kirchhoff's major contribution to physics was his experimental discovery and theoretical analysis in 1859 of a fundamental law of electromagnetic radiation : for all material bodies, the ratio of absorptive and emissive power for such radiation is a universal function of wavelength and temperature... Outstanding among his other contributions were his early work on electrical currents and the propagation of electricity in conductors". (DSB VII p. 379)**2915/L5AR‎