Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 5797348 | Feed method and apparatus for fish farms An apparatus for feeding fish includes a member operable to be disposed in a body of water. The member has a wall for containing fish food and for defining a feeding area and the wall has upper and lower portions. The upper portion is operable to project ... | 08/25/1998 |
