Miscellanea astronomica ossia raccolta di articoli pub. dalla Specola vaticana in diversi giornali scientifici ...
... last section that the two symbols W and S will express all the grades of shading that an observer can estimate directly. ... numbers 0, 4, 6, 10, which follow no law, could advantageously be replaced by the arithmetical progression: 0, 3, 6, 9.
| Title | : | Miscellanea astronomica ossia raccolta di articoli pub. dalla Specola vaticana in diversi giornali scientifici ... |
| Author | : | Specola vaticana |
| Publisher | : | - 1924 |
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