Retail realists advocate abandoning wholesale arguments, which concern the reality of theoretical entities in general, and embracing retail arguments, which concern the reality of particular kinds of theoretical entities. They can thus be realists about some and anti-realists about others. But realism about a kind of entity can take different forms depending on how retail realists individuate kinds of entities. This chapter introduces the notion of the inclusiveness of individuation: the more inclusively we individuate a kind of entity, the more (...) theories there are in which it appears. The form of realism that retail realists accept regarding a particular kind of entity can be more selective or more encompassing depending on how inclusively they individuate that kind of entity. This chapter illustrates these ideas in terms of a case from the history of chemistry involving the hypothetical component of hydrochloric acid known as the muriatic radical. (shrink)

Lavoisier defined an element as a chemicalsubstance that cannot be decomposed usingcurrent analytical methods. Mendeleev saw anelement as a substance composed of atoms of thesame atomic weight. These `definitions' doquite different things: Lavoisier'sdistinguishes the elements from the compounds,so that the elements may form the basis of acompositional nomenclature; Mendeleev's offersa criterion of sameness and difference forelemental substances, while Lavoisier's doesnot. In this paper I explore the historical andtheoretical background to each proposal.Lavoisier's and Mendeleev's explicitconceptions of elementhood differed from eachother, and (...) from the official IUPAC definitionof `element' of the 1920s. However, Lavoisierand Mendeleev both subscribed to – andemployed – a deeper notion of a chemicalelement as the component of compound substancesthat (i) can survive chemical change, and (ii)explains the chemical behaviour of itscompounds. (shrink)

(1974). Ideas on the composition of muriatic acid and their relevance to the oxygen theory of acidity. Annals of Science: Vol. 31, No. 3, pp. 213-225.