Albert Einstein (1879-1955)

Lot 62
09.12.2020 00:00UTC +00:00
Classic
Prix de départ
£ 12 000
AuctioneerCHRISTIE'S
Lieu de l'événementRoyaume-Uni, London
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ID 470114
Lot 62 | Albert Einstein (1879-1955)
Valeur estimée
£ 12 000 – 18 000
Albert Einstein (1879-1955)

Letter to Donald S. Johnson. 2 January 1954

EINSTEIN, Albert (1879-1955). Typed letter signed ('A. Einstein') to Donald S. Johnson, 112 Mercer Street, Princeton, 2 January 1954.



In English. One page, 279 x 215mm, with blind-stamped address (narrow chips to upper and lower margins).



On the omnipresence and uniformity of gravity. 'It is impossible to screen off the gravitational field. That the gravitational field differs in this respect from the electric field is due to the fact that there exist electric masses of both (positive and negative) signs, while there exist no negative gravitating masses'.



In a rare English letter of the utmost simplicity, Einstein patiently explains to a non-scientist the basic reality and difference of gravity and electricity. Einstein's theory of general relativity in 1915 had transformed understanding of the nature of gravity. Resolving the relationship between gravity and electromagnetism was the great, and unresolved, struggle of Einstein's later life.

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