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"We are probably nearing the limit of all we can know about astronomy."
Simon Newcomb, astronomer ; 1888
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| Number | Title | Issue Date |
| 4241392 | Light deflector for use in illumination apparatus Light deflection apparatus is provided for use with apparatus for uniformly illuminating a planar original in which light rays emanating from a flash lamp are blocked from directly striking the original. The deflection apparatus includes a plurality of el... | 12/23/1980 |
| 4225923 | Illumination apparatus Illumination apparatus provides for uniform illumination of a planar original by use of a single flash lamp. A pair of parabolic reflectors partially surround the lamp and direct two separate collimated bundles of light toward opposite sides of the origin... | 09/30/1980 |
| 4183662 | Gravity impelled transport for aligning an original in a copier A gravity impelled transport for moving an original to an exposure station in a photographic printer or copier and there aligning the original in a reference position for exposure. The transport includes an inclined chute defining first and second planar ... | 01/15/1980 |
