Meteorological observations taken at Lewes, Delaware. "The same instrument from which the book was taken, is at No. 94. South Third street Philadelphia."

One chart is addressed to Benjamin Franklin, "président de l'Etat de Pennsylvanie et président de la société phylosophique...1789." All or most of the material was sent to Thomas Jefferson as president of the United States and of the American Philosophical Society. Contains also an English translation of the above Observations... Contains also copies made by M. Legaux of tables 2-5.

These are daily observations of temperature, humidity, wind, and precipitation kept by Bartram in Philadelphia. He also notes such occurrences as "River [Schuylkill] froze over" (February 7, 1790).