Dmitri Mendeleev, while not creatively a philosopher of science, nor a student of systematic philosophy, was eminently a philosophical scientist. Concern about the nature and foundations of his science is evident throughout the text and footnotes of the Principles of Chemistry. One has to presume that his conclusions provided him with some direction for “the study of his great generalizations” in chemistry, especially for the greatest fruit of his efforts, the Periodic System of the Elements. At least it is apparent (...) that somehow he acquired a much greater confidence in the feasibility of systemizing extant chemical knowledge than almost any of his contemporaries. (shrink)

Robert Boyle's corpuscular philosophy was an important instance in the history of thought of a use of metaphysical principles in formulating new methods for physical science. Since Boyle nowhere completely and explicitly discussed his metaphysic, I shall undertake to reconstruct it and trace its influence on his scientific work.

Thus one must justify any category which he proposes as ultimate, and a classic justification is to raise imaginative thinking to a reductio ad absurdam, in which being, imagined without the category, is shown to be incompatible with being as we best know it, i.e., as including some other category which the philosophical community to whom he addresses his remarks will not deny.