File:1948 Ammonia Molecule Clock Backside.jpg
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A 1948 photograph showing the backside of the first atomic clock showing the electronic components contained inside the two equipment racks. Lyons is kneeling on the right.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:38, 22 February 2016 | | 2,381 × 3,000 (861 KB) | Mlombardi (talk | contribs) | A 1948 photograph showing the backside of the first atomic clock showing the electronic components contained inside the two equipment racks. Lyons is kneeling on the right. |
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