"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 |
| 4747831 | Cannula insertion set with safety retracting needle A cannula insertion needle projects from the "forward" end of a hollow handle. After use to start a cannula, the needle is released from the end of the handle and its sharp end retracted into the handle, beyond reach. Preferably the handle has an aperture... | 05/31/1988 |