[ Dr. Goodwin’s lucid and exceedingly comprehensive description of this extraordinary mechanism has been deleted by the Executive Council of the International Association of Science as too dangerously suggestive to scientists of the Central European Powers with which we were so recently at war. It is allowable, however, to state that his observations are in the possession of experts in this country, who are, unfortunately, hampered in their research not only by the scarcity of the radioactive elements that we know, but also by the lack of the element or elements unknown to us that entered into the formation of the fiery ball within the cube of black crystal. Nevertheless, as the principle is so clear, it is believed that these difficulties will ultimately be overcome.⁠— J. B. K. , President, I.A. of S. ]