Topic summary
Charles Janet
Charles Janet (French:; 15 June 1849 – 7 February 1932) was a French engineer, company director, inventor and biologist. He is also known for his left-step periodic table of chemical elements.
Topic summary
Charles Janet (French:; 15 June 1849 – 7 February 1932) was a French engineer, company director, inventor and biologist. He is also known for his left-step periodic table of chemical elements.