Publisher Information: 1915.
Einstein, Albert (1879-1955) and Wander Johann de Haas (1878-1960). Notiz zu unserer Arbeit “Experimenteller Nachweis der Ampèreschen Molekularströme.” Offprint from Verhandlungen der Deutschen Physikalischen Gesellschaft 17 (1915). 1 sheet (p. 420). 228 x 156 mm. Original printed wrappers. Fine copy.
First Edition, Offprint Issue. In 1915 Einstein and Dutch physicist Wander Johannes de Haas conducted gyromagnetic experiments leading to the discovery of the Einstein-de Haas effect, which corresponds to the mechanical rotation induced in a ferromagnetic cylinder suspended inside a coil when an impulse of electric current is sent through the coil. Einstein was very enthusiastic about the experimental results, stating that he and de Haas had “given firm proof of the existence of Ampère’s molecular currents” (quoted in Pais, Subtle is the Lord, pp. 245-246). Einstein and de Haas published their results in a paper published earlier in 1915 (see Weil *73); the present “Notiz” is a response to a communication from American physicist Samuel Jackson Barnett, who had begun performing similar experiments in 1909 and obtained results complementing those of Einstein and de Haas. Weil, Albert Einstein Bibliography, *73(n).Book Id: 43295