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 |
| 5094400 | Spraying apparatus A spraying device includes a cap and two barrels coupled to form a structure. Compressed air can be supplied from the rear end of the structure. A cup for containing paint materials is coupled to the front end of the structure. A nozzle is disposed in the... | 03/10/1992 |
