Abstract

Experimental natural philosophy was a mid-seventeenth-century development in which physical enquiry proceeded by connecting phenomena in an experimentally guided fashion, as opposed to attempting to account for them in terms of some underlying micro-corpuscular structure. The approach proved fruitful in two areas: Boyle’s experiments on the air pump and Newton’s experiments on the prism. This chapter argues that Lockean empiricism, which was subsequently taken to embody the principles behind Newtonianism, was an outcome of these developments and that it was worked into an epistemological doctrine only when Locke encountered Malebranche’s vindication of the sole legitimacy of micro-corpuscularian explanation. The chapter reveals a form of empiricism—empiricism as a successor to, and refinement of, seventeenth-century experimental natural philosophy—which is intimately tied up with natural-philosophical practice, and is quite distinct from the speculative epistemology to which it is reduced in the rationalism and empiricism debates.