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 |
| 5882365 | Soot disaggregating combustible agent Solid combustible agent for disaggregating soot and tarry deposits in chimney flues, said agent comprising an aggregate of cellulosic particulate material, chemical and/or catalytic soot disaggregating agent and binder. This agent is preferably used alone... | 03/16/1999 |
