VOL. 3 of the “Collected Papers in Physics” from Osaka University consists of thirteen copies of papers which have appeared in the Report of Radio Research in Japan, the Proceedings of the Physico-Mathematical Society of Japan, the Japanese Journal of Physics and the Proceedings of the Institute of Radio Engineers of the United States, between June 1935 and March 1936. They cover subjects such as atomic bombardment, short-wave production, modulation of oscillators, polar molecules, electron diffraction, neutrons and protons and dynatrons. The volume extends to about 125 pages, and is produced by wiring together the separate copies of the papers, with a title page and table of contents, the size of the page being 19 cm. by 26 cm. The original covers of the papers are retained. This inexpensive method of issuing collected papers from periodicals with pages of the same size seems worthy of extension.