Best known as a moralist and one of the founders of the Scottish Common Sense school of philosophy, Thomas Reid was also an influential scientific thinker. Here his work on the life sciences is studied in detail, bringing together unpublished transcripts of his most important papers on natural history, physiology, and materialist metaphysics. Part I provides the first published account of Reid's reflections on the highly controversial theories surrounding muscular motion and the reproduction of plants and animals and relates them (...) to the broader Enlightenment debates on these issues. It also contains the first systematic reconstruction of Reid's opposition to materialism and views his polemics against the noted Dissenter Joseph Priestley in terms of their differing interpretations of the Newtonian legacy, their conflicting philosophical assumptions, and the cultural politics of Common Sense philosophy in the 1770s. Part II reproduces a selection of Reid's most significant papers on the life sciences, including his Glasgow Literary Society discourses on muscular motion and on Priestley's materialism, as well as other manuscripts that document the development of his scientific ideas. (shrink)

The mature materialism of Joseph Priestley's Disquisitions relating to Matter and Spirit of 1777 is based on three main arguments: that Newton's widely-accepted scientific methodology requires the rejection of the 'hypothesis' of the soul; that a dynamic theory of matter breaks down the active/passive dichotomy assumed by many dualists; and that interaction between matter and spirit is impossible. In Matter and Spirit it is the first two arguments which are given greatest prominence; but it is the third argument which first (...) brought Priestley to take materialism seriously. It was an argument which had persistently troubled him in his dualist years, but it was not until 1774 in the Examination that he 'first entertained a serious doubt of the truth of the vulgar hypothesis'. Underlying this fact is an episode of some complexity which this article examines. (shrink)