Artificial Horizon (water)

Tool · mentioned in 1 journal entry

Planning Westward Fort Clatsop Return Post-expedition NPS L&C NHT trail data © National Park Service
AI-extracted reference. Each entry below was identified by AI as mentioning Artificial Horizon (water). Spelling variants may not be merged. see related variants →
Lewis: July 22, 1804
Meriwether Lewis · Jul 22, 1804 · Near Platte River, Council Bluffs area
"Ellicott's design using water reflecting surface"

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