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(1745-1813), was prominent in the pre-Revolutionary movements. He was chairman of the committee of the Pennsylvania Conference which decided for independence. He was a member of the Continental Congress in 1776 and signed the Declaration of Independence. He was physician-general of the Middle Department from 1777 to 1778, and was a member of the Pennsylvania Convention of 1787. He was treasurer of the U.S. Mint from 1799 to 1813. His observations and discoveries in medical science were second to none, and he was noted for philanthropy.