FROM time to time news is being received of scientific men and institutions on the Continent of Europe, who have been cut off from Great Britain for some Bye years. A note referring to some Belgian biologists and Belgian biological publications, based on material provided by Dr. Julian Huxley, appeared in Nature of August 11, p. 166. Dr. John W. Wells contributed an article on French and German geographical and geological institutes to Nature of August 25, p. 243. Dr. F. W. Sansome has referred to correspondence with some Danish men of science (Nature, September 1, p. 263). Now Dr. Huxley has put at our disposal two letters received by him from Dr. N. Tinbergen, of Leyden, and Dr. A. Buzzati-Traverso, of Verbania, Pallanza, Italy, the substance of which is printed below.