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1. Are you familiar with the literature pretaining to the internal administration of radium? 2. Have you ever noted anything in such literature which showed contraindication for the use of radiuia internally? 3. Over what period of time does the internal administration of radium extond? 4. Do you recall whon articles first began to appear in the literature with reference to this subject? 5. Have there appeared any articles on this subject of recent date, and 1f so how recent? 6. To the best of your knowledge is radium being used internally by the medical profession at the present time? 7. Was radium used internally in 1925? 8. Was radium used internally in 19157 9. Was radium used internally betweon the periods of 1915 to 1925? 10. State your knowledge as to use of radium internally up to the present timo, as gathered by your experience and your reading? 11. Have you ever used radium internally? 12. Have you prescribed the use of radium internally by mouth? 13. Have you used it by injection, oither intravenously, intramuscularly, or sub- cutaneously? 14. During what periods have you prescribed the use of redium internally? 15. What was the average dosage, expressed in micrograms of radium element,used by you? 16. What part of a milligran is a microgran? 17. What part of a gram is a milligran? 18. What part of a gram is a microgram? 19. For deep ray therapy can you give us a rough estimate of suallest amount of radium,