"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 |
| 4266770 | Blackjack 21 computer A hand held counter particularly adapted for counting cards during games of Blackjack. The counter includes two lever arms mounted for incremental rotation on a vertical axle in a cylindrical casing. The cylindrical casing includes a circular faceplate ha... | 05/12/1981 |