Memoirs of the Life of David Rittenhouse, LLD. F.R.S. Late President of the American Philosophical Society is a comprehensive biographical account chronicling the remarkable life and achievements of David Rittenhouse, one of early America's most distinguished scientists, astronomers, and public figures. Written by William Barton and first published in 1813, this volume delves deeply into Rittenhouse's humble beginnings in rural Pennsylvania, tracing his ascent from a self-taught mechanic and clockmaker to a celebrated astronomer, mathematician, and statesman. The book meticulously details Rittenhouse's groundbreaking work in astronomy, including his celebrated observations of the transit of Venus in 1769, which brought him international acclaim and solidified his reputation among the leading scientific minds of his era. It explores his innovative contributions to the construction of orreries and precision instruments, his pivotal role in the American Revolution as a member of the Committee of Safety, and his service as the first director of the United States Mint. Through extensive correspondence, personal anecdotes, and contemporary accounts, Barton paints a vivid portrait of Rittenhouse's intellectual curiosity, humility, and dedication to the advancement of science and public service. In addition to chronicling Rittenhouse's scientific endeavors, the memoir provides insight into his personal life, character, and relationships with prominent figures such as Benjamin Franklin, Thomas Jefferson, and George Washington. The narrative is enriched by discussions of the broader scientific and political context of the late 18th and early 19th centuries, offering readers a window into the intellectual ferment of the American Enlightenment. Memoirs of the Life of David Rittenhouse stands as both a tribute to a pioneering American thinker and a valuable historical document, preserving the legacy of a man whose work helped shape the scientific and civic landscape of the young United States. This detailed biography is essential reading for anyone interested in the history of science, the American Revolution, or the lives of the nation's early innovators.