The third president knew that the whims of nature shaped Americans’ daily lives as farmers and enslavers

Between July 1776 and June 1826, Jefferson recorded weather conditions in 19,000 observations across nearly 100 locations. Illustration by Meilan Solly / Images via Wikimedia Commons under public domain and the Jefferson Weather and Climate Records
The Declaration of Independence was off to the press, so Thomas Jefferson spent July 4, 1776, in search of a decent thermometer. By lunchtime, a breeze ruffled the red brick of Philadelphia’s Independence Hall. Rain clouds tumbled in. A southwest wind swung through the streets, setting tavern signs to wheel and squeak, but the skies held. The city’s brutal summer melted into mild. Jefferson, a citizen scientist who tracked the weather wherever he went, grew eager to get a reliable read.
On Second Street, Jefferson nipped into John Sparhawk’s busy London Book-Store. Crowned with a unicorn and mortar logo, the emporium boasted new medicines, literature and “an assortment of curious hardware.” Continue reading