Hideki Yukawa (1907-81) Signed Ensemble, "H. Yukawa, Dept. Physics, Columbia University New York 27, N.Y.", black ink, 4 x 2.25, enclosed in a protective envelope and mounted on an original collector's display sheet, 8.5 x 10, with a short biographical note printed at the top, by the Japanese theoretical physicist who in 1935 published his theory of mesons, which explained the interaction between protons and neutrons, and was a major influence on research into elementary particles. He became the first Japanese Nobel laureate with the receipt of the 1949 Nobel Prize in Physics 'for his prediction of the existence of mesons on the basis of theoretical work on nuclear forces.' In 1949, Yukawa became a professor at Columbia University, the same year he received the Nobel Prize in Physics. He was also a member of the Fellowship of the Royal Society of Edinburg (FRSE). This attractive, signed collector's ensemble is in fine condition.