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| 正面描述 | 登录 以查看详情 |
|---|---|
| 正面文字 | 登录 以查看详情 |
| 正面铭文 | JOSEPH PRIESTLEY |
| 背面描述 | The reverse depicts Priestley leaning over a laboratory bench, conducting his famous oxygen experiment, surrounded by period scientific apparatus including a burning lens, flasks, and a retort over a flame, all in high relief against a polished field. The curved legend BICENTENNIAL OF THE DISCOVERY OF OXYGEN arcs around the upper portion of the field, with the dates 1774-1974 below it. An engraver's monogram appears near the lower right. |
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| 背面铭文 | Bicentennial of the Discovery of Oxygen 1774-1974 |
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