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acid Advancement of Science American Association animals April April 11 ARCHAEOLOGY astronomers atoms babies Baltimore birds blood body Bureau California cancer cause cells chemical Chemistry chemists City Classic of Science color Columbia Broadcasting System diet discovery disease earth Editor effect electric electrons Engineering experiments February feet fever Frank Thone heat Indians Institute J. W. Young January June June 20 known laboratory light magnetic March ment metal method miles moon Museum Nabonidus National Observatory observed Pasadena patients photograph physical plants present Prof PSYCHOLOGY Public Health radio radium Raymond Pearl rays reported Research Council Science News Letter Science Service scientific scientists Scripps species speed stars sunspots telescope temperature theory tion tional tube U. S. Patent Office University Vernon Kellogg vitamin Washington Watson Davis WEEKLY SUMMARY X-rays York