1743

Events in 1743 2

• 1743 – 1756 Black — carbon dioxide and latent heat First identification of a distinct gas and hidden heat Joseph Black of Edinburgh discovered carbon dioxide (which he called "fixed air") in the 1750s, demonstrating that it was a chemically distinct gas absorbed and released during certain reactions. He also discovered latent heat — the heat absorbed or released during changes of state without temperature change — which was fundamental to understanding the steam engine and thermodynamics.
• 1743 – 1826 Thomas Jefferson 3rd President — author of the Declaration of Independence Thomas Jefferson (Apr 13, 1743 – Jul 4, 1826) was the 3rd President 1801-1809, principal author of the Declaration of Independence, and architect of the Louisiana Purchase. He died on the same day as John Adams, July 4, 1826.