This article was originally published with the title “ A Completed Chapter in the History of the Atomic Theory ” in SA Supplements Vol. 42 No. 1081supp (September 1896), p. 17280 doi:10.1038 ...

Dalton's own notebook shows that his atomic theory preceded his work on marsh gas, and his notes for a lecture delivered in 1810 give a history of his ideas which agrees with all the facts.1.

Books Received; Published: 16 April 1896 A New View of the Origin of Dalton's Atomic Theory: a Contribution to Chemical History, &c La Théorie Atomique et la Théorie Dualistique.

The dropping of the atomic bomb on Hiroshima, Japan, effectively ended WWII, but took thousands of civilian lives. On August 6, 1945, the bomb was dropped on the city.

July 16 is National Atomic Veterans Day, dedicated to the thousands of troops who participated in secret nuclear testing or were POWs in Nagasaki or Hiroshima.

On Aug. 6, 1945, the U.S. dropped an atomic bomb on the Japanese city of Hiroshima — becoming the only country to ever use nuclear weapons during wartime.