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To the three requirements of a modern Periodic Table, as stated by A. A. Clifford 1, must be added a fourth, namely, that it should be in as close accord as possible with chemical facts, and above all ...

ALTHOUGH one may be inclined to criticise the inclusion of this volume in Sir William Ramsay's well-known series of text-books of physical chemistry, it is to be heartily welcomed on its own account, ...