"The universal meaning of the quantum of action", by Jun Ishiwara
  Commented translation of the paper "Universelle Bedeutung des
Wirkungsquantums", published by Jun Ishiwara in German in the Proceedings of
Tokyo Mathematico-Physical Society 8 106-116 (1915). In his work, Ishiwara,
tenured at Sendai University, Japan, proposed - simultaneously with Arnold
Sommerfeld, William Wilson and Niels Bohr in Europe - the pase-space-integral
quantization, a rule that would be incorporated into the old-quantum-mechanics
formalism.
