Its membership included
not only prominent men throughout America, such as Thomas
Jefferson, who were interested in scientific inquiry, but also
representatives of foreign nations. With its library of rare and
valuable collections and its annual publication of essays on
almost every branch of science, the society still continues its
useful scientific work.
John Bartram, who was the first botanist to describe the plants
of the New World and who explored the whole country from the
Great Lakes to Florida, was a Pennsylvania Quaker of colonial
times, farmer born and bred. Thomas Godfrey, also a colonial
Pennsylvanian, was rewarded by the Royal Society of England for
an improvement which he made in the quadrant. Peter Collinson of
England, a famous naturalist and antiquarian of early times, was
a Quaker. In modern times John Dalton, the discoverer of the
atomic theory of colorblindness, was born of Quaker parents, and
Edward Cope, of a well-known Philadelphia Quaker family, became
one of the most eminent naturalists and paleontologists of the
nineteenth century, and unaided discovered over a third of the
three thousand extinct species of vertebrates recognized by men
of science.
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