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Features an example of a route survey conducted by William Clark in 1805 of the falls, rapids, cascades and ravines from the lower portage camp to the upper falls (Black Eagle) and beyond, using a circumferentor (surveyor's compass) to determine bearings or directions, and a two-pole chain as a measuring unit.
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Classroom Considerations
- Knovation Readability Score: 5 (1 low difficulty, 5 high difficulty)
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