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 |
| 7000659 | Adzer mount assembly An adzer mount assembly having a slider box with a vertical slider and horizontal sliders. The vertical slider has an adzer which can be precisely positioned over a crosstie by hydraulic transverse movement of the slider box and vertical movement of the vertical sli... | 02/21/2006 |
| 4493351 | Apparatus for copy-machining a workpiece Apparatus for copy-machining a workpiece includes a disk miller assembly acting as a shaping tool and a grinding belt extending between return pulleys and acting as a surface finishing tool assembly, both of the tool assemblies are mounted on pivot arms f... | 01/15/1985 |
| 3979817 | Door hinge applying method A door hinge applying unit and method for supporting and releasably holding a door and the hinge jamb of the door frame in positions alongside each other with the butt-receiving surfaces of the door and jamb coplanar for applying the butts of a butt hinge... | 09/14/1976 |
