Gerard Troost
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Gerardus Troost was a Dutch-American medical doctor, naturalist, mineralogist, and founding member and first president of the Philadelphia Academy of Natural Sciences.
Gerard Troost
Drawing of Troost from a 1909 publication
Thomas Say
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Thomas Say was an American entomologist, conchologist, and herpetologist. His studies of insects and shells, numerous contributions to scientific journals, and scientific expeditions to Florida, Georg
Gerard Troost
…1816, Troost was elected as a member of the American Philosophical Society. In 1825, he joined the New Harmony experiment, in New Harmony, Indiana, with Thomas Say. In 1827, he moved to Nashville, Tennessee, where he became a professor of mineralogy and chemistry at the University of Nashville. From 1831 until…
Thomas Say by Joseph Wood, c. 1812
Say's phoebe (Sayornis saya)
Papilio turnus (= Papilio glaucus), from American Entomology