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Meriwether Lewis who had been appointed to the rank of Captain, was designated as the expedition "scientist". Prior to the expedition, Lewis went to Philadelphia for intense training by physician Benjamin Rush, astronomer-surveyor Andrew Ellicott, botanist Benjamin Barton, anatomist Casper Wister, and mathematician Robert Patterson. For three months he was tutored in the spring of 1803. The skills that Lewis learned would be passed on to Clark as they traveled.

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15y ago

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