Abstract

THE statement appears in NATURE of April 28, p. 656, that “Mendeleeff's first table, published in 1871, bears a remarkable resemblance to that of the present day”. As a matter of fact, Dmitri Ivanovitch Mendeleeff began his investigations on the correlation of chemical properties with the atomic weight of elements in 1868, and succeeded in evolving the periodicity of this relationship at the end of that year. He printed the first periodic table in the middle of February, 1869, as follows:

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