1842- John C. Frémont sets off from Kansas River on his first expedition of the Oregon Trail with frontiersman Kit Carson as his guide.
1844- Charles Goodyear patents the vulcanization of rubber.
1877 - Henry Ossian Flipper becomes 1st African American to graduate from West Point Military Academy.
1907- Researcher George Soper publishes the results of his investigation into recent typhoid outbreaks in the New York area and announces that Mary Mallon [Typhoid Mary] is the likely source of the outbreak.
1844- Charles Goodyear patents the vulcanization of rubber.
1877 - Henry Ossian Flipper becomes 1st African American to graduate from West Point Military Academy.
1907- Researcher George Soper publishes the results of his investigation into recent typhoid outbreaks in the New York area and announces that Mary Mallon [Typhoid Mary] is the likely source of the outbreak.
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