| 21. | Roentgen did not confine his attentions to Paris, or even to France.
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| 22. | Roentgen was born in M�lheim am Rhein, Germany.
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| 23. | Kevin Roentgen went on to record and perform under the moniker Praying Hands.
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| 24. | It might cause us to curtain the use of roentgen rays in dentistry.
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| 25. | Wilhelm Roentgen may have forseen fanciful uses some might find for his marvelous rays.
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| 26. | A safe annual exposure is considered to be in the range of five roentgen.
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| 27. | 1895-Discovery of X-rays is announced by German physicist Wilhelm Roentgen.
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| 28. | Twenty roentgens per hour is generally considered safe.
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| 29. | He and David Roentgen were Marie-Antoinette's favourite cabinet-makers.
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| 30. | Radiation levels in humans are measured in units of REM or Roentgen equivalent man.
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