Emil Erlenmeyer
Richard August Carl Emil Erlenmeyer , known in his own day and subsequently simply as Emil Erlenmeyer ( 28 June 1825 – 22 January 1909 ) , was a German chemist known for contributing to the early development of the theory of structure , formulating the Erlenmeyer rule , and designing the Erlenmeyer flask , a type of specialized flask , ubiquitous in chemistry laboratories , which is named after him . 
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