EINSTEIN S RESPONSE TO THE NEW DYNAMICS 457finishing touches to his 1949 article [B6], and we discussed these matters often at
that time. (It was during one of these discussions that Einstein sneaked in to steal
some tobacco [PI].) However, it needs to be stressed that other theoretical physi-
cists and mathematicians have made important contributions to this area of prob-
lems. Experimentalists have actively participated, as well. A number of experi-
mental tests of quantum mechanics in general and also of the predictions of specific
alternative schemes have been made.* This has not led to any surprises.
It has been stressed many times that, in order to follow Einstein's thinking, it
is necessary to see him both as a critic and as a visionary. In this chapter the critic
has been portrayed. In the next we meet the visionary.
References
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B4. The Born-Einstein Letters, p. 130. Walker, New York, 1971.
B5. N. Bohr, Nature 121, 580 (1928).
B5a. L. de Broglie, New Perspectives in Physics, p. 150. Basic, New York, 1962.
B6. N. Bohr in Albert Einstein: Philosopher-Scientist (P. Schilpp, Ed.), p. 199.
Tudor, New York, 1949.
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B8. V. Bargmann, Helv. Phys. Acta 7, 57, (1933).
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BIO. , [B6], p. 232.
Bll. , Phys. Rev. 48, 696 (1935).
Cl. H. B. G. Casimir, letter to A. Pais, December 31, 1977.- R. W. Clark, Einstein: The Life and Times, p. 603. Avon Books, New York, 1971.
Dl. P.A.M. Dirac, Proc. Roy. Soc. A114, 243 (1927).
El. A. Einstein, letter to C. Lanczos, March 21, 1942.
E2. W. Elsasser, Naturw. 13,711 (1925).
E3. A. Einstein, letter to R. A. Millikan, September 1, 1925.
E4. , letter to P. Ehrenfest, August 23, 1926.
E5. , letter to P. Ehrenfest, August 28, 1926.
E6. , in James Clark Maxwell, p. 66. Macmillan, New York, 1931.
E7. , letter to M. Besso, December 25, 1925; EB, p. 215.
E8. , letter to H. Born, March 7,1926. Reprinted in The Born-Einstein Letters
(M. Born, Ed.), p. 91. Walker, New York, 1971.
E9. , letter to E. Schroedinger, April 26, 1926. Reprinted in Letters on Wave
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E10. , letter to M. Besso, May 1, 1926; EB, p. 224.
"Typically, these tests deal with variants of the EPR arrangement, such as long-range correlations
between spins or polarizations. I must admit to being insufficiently familiar with the extensive the-
oretical and experimental literature of these topics. My main guides have been a book by Jammer
[Jl] and a review article by Pipkin [P2]. Both contain extensive references to other literature.