Joseph Louis Gay-Lussac, French physicist and chemist Finish:Float frame within an hour of each

within an hour of each other

The United States Pacific Railroad Survey party crosses an area west of present-day Helena

pictured at home in Knowle

5 May 1917

I was born in 1863

Joseph Louis Gay-Lussac, French physicist and chemist Finish:Float frame within an hour of eachJoseph Louis Gay Lussac, French physicist and chemist, 1848. Gay Lussac (1778 1850) made balloon ascents to investigate terrestrial magnetism and composition and characteristics of the atmosphere at different altitudes. He determined that the same volume of any gas will expand equally in response to the same increase in temperature. Amongst his achievements in chemistry were recognising iodine as a chemical element, and being one of the discoverers of