Still further, a reviewer3 of "Phases of Modem Science," a hook compiled by the Royal Society of England, writes on publicity and science as follows: "The literary public is hardly dealt with where science is concerned. In periodical literature, as often as not, and with a few notable exceptions, the choice lies between what is technically accurate and dull and what is sensational and quite untrustworthy. This generation has seen science take its place as an essential element in education, and scientific experiment, once camed on in fear and secrecy, has now become a part of every boy's work a t school. Indeed, with such innovations as electric bells and lighting, telephones and wireless, i t is practised in every household. Yet there seem few enough writers who, having the necessary knowledge of science and, more important, understanding and enthusiasm for the objects and purposes of research, combine with these qualities the purely literary faculty for selecting and arranging material and presenting i t in W. R. W. readable form." Dutch Chemist to Teach at Cornell. Prof. Ernest Cohen of the University of Utrecht and president of the International Union of Pure and Applied Chemistry which will meet in Philadelphia next April has been appointed the first incumbent of a new Cornell visiting professorship made possible by an anonymous gift of $250,000. From February to June he will lecture on the most recent advances of chemistry, and tell of his own original investigations in physical and inorganic chemistry which have won him international distinction.-Science Sewice "Make Hay While Sun Shines" Proves Scientific Maxim. " 'Make hay while the sun shines' is more than a mere poetic slogan, for hay made in the dark is devoid of rickets-preventing properties." This was the keynote of a discussion on the importance of light for the maintenance of animal life before the meeting of the National Academy of Sciences, by Drs. H. Steenbock and E. B. Hart of the University of Wisconsin. The hitherto unappreciated importance of the ultra-violet radiation from the 4un is now recognized, and this invisible light is known to be the factor deciding between success and failure in animal rearing, Dr. Steenhock said. Animals obtaining sufficient full sunlight, or the proper kinds of foods on which sunlight has shone, live healthily and normally; but, said Dr. Steenhock: "Unfortunately these rays are not present in sufficient degree to ~ r o v i d ea wide margin of safety fur the animal. As n result we have rickets in the young and poor dentition, restricted lactation, abonivn and irnpovcrishrnent of the skeleton in lime to a dangerous extent in the adult. All of which appears to he of greater importance in animal welfare than has been generally realized." The prevention of these dire results, in animals as well as in human beings, has been shown to depend on the normal action of the blood in laying down the element calcium in the proper places and sufficient quantities. This building of the limy parts of the body has in turn been shown to depend on the action of the invisible short-wave light rays, which may he administered directly or through certain types of food, especially those rich in cholesterol, a substance related to the fats.-Science Senice "Onlooker," Discovery, 6, 373-5 (1925).
