Word: gamma
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Dates: during 1930-1939
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...known of cosmic rays. But of other rays a progressive series of effects on living matter may be observed. Heat, for example-and Dr. Heyroth pursued his thesis* with mounting excitement- sears the flesh immediately. X-rays cause a burn which becomes evident three weeks to six months after. Gamma-ray burns do not show for years. "So the cosmic rays, we believe, must take infinitely longer still. Of what investigation we have made of these rays, we venture what seems to be a wholly new theory as to why- exempting not even the strongest and most sheltered...
...Gamma Delta Sirs...
...magazine of the Phi Gamma Delta fraternity (alumni: Calvin Coolidge, Newton D. Baker, Thomas R. Marshall, Charles Warren Fairbanks, Lew Wallace, Meredith Nicholson, Christy Mathewson, and Rockwell Kent) has a heading for the roster of the marriages of the brethren which reads: MERGERS...
...Association award for outstanding address of the meeting. With three fellow physicists, Drs. L. R. Hafsted and Odd Dahl of Carnegie Institution and Dr. Gregory Breit of New York University, he worked for several years to develop a two-million-volt tube which produces X-rays equivalent to the gamma rays of 182 million dollars worth of radium. Laboratory significance : scientists by using these powerful rays may be able to burst the atom nucleus. Practical significance: X-rays from high voltage tubes resemble cancer-curing gamma rays, may possibly be used as a radium substitute...
...demonstrated. Dr. William David Coolidge in General Electric Laboratories, Schenectady, has been experimenting for the past year with a 900,000-volt tube not yet perfected for demonstration. Hospitals today use a 200,000-volt tube. Five billion dollars worth of radium (20 Ib.) would be necessary to produce gamma rays equal in power to Dr. Millikan's X-rays. The entire U. S. medical profession today possesses only four million dollars worth of radium. Practical use of the Caltech apparatus has not yet been demonstrated. Before it is used on human beings, plants and animals will be subjected...