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Although Aristotle (Metaphysics, Book IV, Chapter 2) was perhaps the first person to consider the part-whole relationship to be a proper subject matter for philosophic inquiry, the Polish logician Stanislow Lesniewski Woodger 30 and Tarski 24 made use of a specific adaptation of Lesniewski's work as a basis for a formal theory of physical things and their parts. The term 'calculus of individuals' was introduced by Leonard and Goodman Contemporaneously with Lesniewski's development of his Mereology, Whitehead 27 and Both Lesniewski 15 and Tarski Between the publication of Whitehead's early work and the publication of Process and Reality 29, Theodore de Laguna 7 published a suggestive alternative basis for Whitehead's theory. This led Whitehead, in Process and Reality, to publish a revised form of his theory based on the two-place predicate, 'x is extensionally connected with y\ It is the purpose of this paper to present a calculus of individuals based on this new Whiteheadian primitive predicate.
Bowman L. Clarke (Wed,) studied this question.