Original journals of the Lewis and Clark Expedition, 1804-1806 printed from the original manuscripts in the library of the American Philosophical Society and by direction of its committee on historical documents |
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 | VII. Astronomy Original journals of the Lewis and Clark Expedition, 1804-1806 |  |
June 9th. 1806.
Error of the Sextant 6′. 15—or Subtractive
| Error of Octant by the back observation on the distant fragment of the broken limb |
2°. 30′. 4″.5 + |
| additive. |
[The final observation was that made on Maria River, by
Lewis, July 23, 1806, and entered both by him and Clark in
the text of the journals.—Ed.]
| VII. Astronomy Original journals of the Lewis and Clark Expedition, 1804-1806 | |