Glass manufacturers included fluorescent materials in UV glass to create certain decorative colors, such as bright green Vaseline glass, or make glass that was highly visible, such as the bright red glass used in tail lights. Scientifically, fluorescence is caused by substances in the glass absorbing invisible ultraviolet light and then releasing the energy as visible light and heat. These are known as fluorescent or ultraviolet glass, or simply UV glass. If you shine a black light on them, they will glow a bright green, orange, red, purple, or yellow color. Mixed in with all the regular pieces of sea glass we find on beaches around the world, there are sometimes pieces that were made with fluorescent materials. Curtiss, representing the National Bureau of Standards for Radium, acted as secretary to the Committee.While every piece of beach glass is special, something magical happens when you find a piece that glows. Wood kindly undertook the revision of the handbook. Representing the American Radium Society: Curtis F. Coolidge, Director, Research Laboratory, General-Electric Company, Schenectady, N. Representing X-ray equipment manufacturers: W. Representing the American Medical Association: Francis Carter Wood, M.D., St. Failla, Physicist, Memorial Hospital, New York City. Newell, M.D., Stanford University Hospital, San Francisco, Calif. Representing Radiological Society of North America: R. Weatherwax, Physicist, Philadelphia General Hospital, Philadelphia, Pa. Pendergrass, M.D., University of Pennsylvania Hospital, Philadelphia, Pa J. Representing American Roentgen Ray Society: E. Representing International Safety Committee and National Bureau of Standards for X-rays: Lauriston S. The following members compose this Committee: 18, setting forth proper conditions for handling radium in the light of present-day knowledge, we turned again to the Advisory Committee on X-ray and Radium Protection. But, the study of the biological effects of the radiation falls outside the field of our activities, and when the problem arose of revising Handbook No. The large amount of radium which has passed through our laboratory has made it necessary to give considerable attention to this problem of radium protection. The National Bureau of Standards has been engaged in the standardization of radium for medical purposes since 1913 and during this period has measured nearly all radium offered for sale in this country. Since the injury does not become apparent immediately, workers may frequently be tempted to neglect routine precautions. Even when proper working conditions and suitable regulations exist, there is still the potential danger of excessive exposure as a result of improper use of safety equipment and violation of good practice. On the other hand, serious injury has resulted from relatively short periods of work with radium in cases in which certain precautions were overlooked. Sufficient experience and data are now available, however, to show with fair conclusiveness that with reasonable precautions radium can be handled over a considerable period of years with no apparent harm. The dangers arising from exposure to the radiation from radium are in some cases now well known in others, still obscure and uncertain. THE rapid increase in the use of radium during the last few years, resulting in the acquirement of large amounts of radium by various institutions, has brought with it the need for better safeguards and rules to protect the users from the radiation.
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