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Ideas of Dmitri Mendeleev, by Text

[Russian, 1834 - 1907, Professor of Chemistry at St Petersburg University.]

1870	The Principles of Chemistry

p.118

17402

Mendeleev saw three principles in nature: matter, force and spirit (where the latter seems to be essence) [Scerri]

p.118

17400

Mendeleev focused on abstract elements, not simple substances, so he got to their essence [Scerri]

p.118

17401

Mendeleev had a view of elements which allowed him to overlook some conflicting observations

I:23

p.115

17399

Elements don't survive in compounds, but the 'substance' of the element does