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Lot 34
EINSTEIN, ALBERT. 1879-1955. Bemerkung uber periodische Schwankungen der Mondlange, welche bisher nach der Newtonsche Mechanik nicht erklarbar schienen. [Offprint from:] Sitzungsberichte der Koniglich Preussischen Akademie der Wissenschaften XXI. XXII. XXIII, 1919. Berlin: Reichsdruckerei, 1919.
4 December 2019, 13:00 EST
New YorkUS$3,000 - US$5,000
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EINSTEIN, ALBERT. 1879-1955.
Bemerkung uber periodische Schwankungen der Mondlange, welche bisher nach der Newtonsche Mechanik nicht erklarbar schienen. [Offprint from:] Sitzungsberichte der Koniglich Preussischen Akademie der Wissenschaften XXI. XXII. XXIII, 1919. Berlin: Reichsdruckerei, 1919.
8vo (250 x 178 mm). Publisher's printed wrappers.
Provenance: H.A. Einstein (1904-1976, his stamp to upper wrapper, "56" in red ink and "24.IV.19" in pencil to upper margin).
EINSTEIN EXPLAINS THE FLUCTUATIONS IN THE MOON'S LONGITUDE. AUTHOR'S PRESENTATION OFFPRINT ISSUE, HANS ALBERT EINSTEIN'S COPY. In a year otherwise consumed by relativity, Einstein here explains the seeming wandering of the moon in the sky as due to a (periodic) change in the earth's own rotation. In Einstein's view the tides determined the earth's moment of inertia, and consequently the rate and angle of the earth's rotation. Using this model, he attempted to compute the effect of the tides on the earth's rotation—and thus the fluctuations in the moon's longitude—but the calculations derived were smaller than the perceived fluctuations in the moon's longitude. The cause of the error in his theoretical results was that Einstein had not used the proper astronomical method of time determination—an error which Einstein admitted in a later addendum to the article. A very unusual "fluctuation" for Einstein. Einstein's presentation offprints of this period (printed "Uberreicht vom Verfasser") are very rare.
8vo (250 x 178 mm). Publisher's printed wrappers.
Provenance: H.A. Einstein (1904-1976, his stamp to upper wrapper, "56" in red ink and "24.IV.19" in pencil to upper margin).
EINSTEIN EXPLAINS THE FLUCTUATIONS IN THE MOON'S LONGITUDE. AUTHOR'S PRESENTATION OFFPRINT ISSUE, HANS ALBERT EINSTEIN'S COPY. In a year otherwise consumed by relativity, Einstein here explains the seeming wandering of the moon in the sky as due to a (periodic) change in the earth's own rotation. In Einstein's view the tides determined the earth's moment of inertia, and consequently the rate and angle of the earth's rotation. Using this model, he attempted to compute the effect of the tides on the earth's rotation—and thus the fluctuations in the moon's longitude—but the calculations derived were smaller than the perceived fluctuations in the moon's longitude. The cause of the error in his theoretical results was that Einstein had not used the proper astronomical method of time determination—an error which Einstein admitted in a later addendum to the article. A very unusual "fluctuation" for Einstein. Einstein's presentation offprints of this period (printed "Uberreicht vom Verfasser") are very rare.