Six days after Wilhelm Roentgen announced in Germany that he had created the first-ever x-ray photograph, the feat was repeated by Professor Henry Louis Smith at Davidson College, North Carolina.

• 就在伦琴于德国宣布已创造出有史以来的第一个 X 光片后，北卡州戴维森学院之路易史密斯教授就重复了这项技术。