(New York, For the American Physical Society by the American Inst. of Physics), 1933.
4to. No wrappers as issued in "Physical Review, vol. 43, March 13, 1933" pp. 491-494. and with 4 textillustr.
First edition. The paper announces the discovery of the first antiparticle ever found. The existance of the positron was predicted by Dirac 3 years before. Anderson was awarded the Nobel Prize in 1936 "For his Discovery of the Positron".
Order-nr.: 38904