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The preeminent American scientist of his age, David Rittenhouse was at once an internationally famed astronomer, master craftsman of scientific instruments, surveyor and patriot. His mechanical models of the solar system, precision clocks, surveyor's theodolites, compasses, and optical lenses were of the highest order available in the world. Although he received little formal education and was a man of ordinary means, his genius was a primary force of colonial American achievements in science, known as the "Age of Enlightenment." . . . |
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 AMERICAN PHILOSOPHICAL SOCIETY American Philosophical Society Library |
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 Projection of the Transit of Venus Norristown Pennsylvania June 3, 1769 |
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The Brothers Rittenhouse |
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