A discussion of the development of the periodic table beginning with Prout's protyle and ending with Mendeleev. Much of the material for this episode has been developed from Eric Scerri's, "The Periodic Table, Its Story and Its Significance." Persons discussed include William Prout, Johann Wolfgang Döbereiner, Leopold Glemin, Max Joseph Pettenkofer, Ernst Lenssen, Alexander Emile Beguyer De Chancourtois, John Newlands, William Odling, Gustavus Hinrichs, Lothar Meyer and Dmitri Mendeleev.
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