1. Lewis and Clark
... , there were only three places with known positions "St. Louis, the Mandan Indian villages on the upper Missouri, and the mouth of the Columbia River. Lewis had to fill in the map by measuring latitude and longitude at places along the route. He had to learn to use a sextant to determine latitude and had to use a special clock called a chronometer for longitude ... at the time. He believed that there were two things that could cure most ailments: bleeding "draining blood from a vein in a person's arm "and purging "making the sick person throw up. Rush helped Lewis by showing him the medi...
- Word Count: 3902
- Approx Pages: 16
- Grade Level: High School