§ 71. The Birth of Modern Chemistry.
Chemistry as distinct from Alchemy and iatro-chemistry commenced with
Robert Boyle (see plate 15), who first clearly recognised that its aim
is neither the transmutation of the metals nor the preparation of
medicines, but the observation and generalisation of a certain class of
phenomena; who denied the validity of the alchemistic view of the
constitution of matter, and enunciated the definition of an element
which has since reigned supreme in Chemistry; and who enriched the
science with observations of the utmost importance. Boyle, however, was
a man whose ideas were in advance of his times, and intervening between
the iatro-chemical period and the Age of Modern Chemistry proper came
the period of the Phlogistic Theory—a theory which had a certain
affinity with the ideas of the alchemists.