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Charles Janet (; 15 June 1849 – 7 February 1932) was a French engineer, company director, inventor and biologist. He is also known for his innovative ''left-step'' presentation of the periodic table of chemical elements.〔 ==Life and work== Janet graduated from the École des Mines and worked for some years in munitions. He then married the daughter of the owner of a manufacturing company and worked for it for the rest of his life, finding time for research in various branches of science. His collection of 40,000 fossils and other specimens was unfortunately dispersed after his death.〔 〕 His studies of the morphology of the head of ants, wasps and bees, and his micrographs were of remarkable quality.〔Johan Bollin and Edward O. Wilson, 'Social insect histology from the 19th century: the magnificent pioneer sections of Charles Janet, (2008) ''Arthropod Structure and Development'' 37, 163–167〕 He also worked on plant biology and finally wrote a series of papers on evolution. He was a prolific inventor and designed much of his own equipment, including the formicarium, in which an ant colony is made visible by being formed between two panes of glass. In 1927 he turned his attention to the periodic table and wrote a series of six articles in French, which were privately printed and never widely circulated. His only article in English was poorly edited and gave a confused idea of his thinking.〔 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Charles Janet」の詳細全文を読む スポンサード リンク
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