This is Volume II of six in a collection on Epistemology. Originally published in 1972, the central concern of this book is the understanding of the nature of the universe. Its field is thus that which until the eighteenth century had been known as philosophia naturalis, the philosophy of nature. The aim of the book is to elucidate and examine the fundamental concepts in terms of which the universe is understood.

This is Volume X of seventeen in a collection on Metaphysics. Originally published in 1994, this text looks at the relevance of Alfred North Whitehead with a collection of philosophical essays on his ideas. He was a scientist-a mathematician and physicist. Then, on the eve of his retirement as professor of applied mathematics in the University of London, at the age of 63, he commenced his second career, as professor of philosophy in Harvard University.

First published in 1961, An Introduction to General Metaphysics presentsGottfried Martin’s careful study of many of the passages in Plato and Aristotle which deal with metaphysical problems and in particular with the Platonic Theory of Ideas. He has traced the development of the theory both in early works and in late works such as the Parmenides and the Sophistes; and with equal care he has studied the relative passages in Aristotle’s Metaphysics. He has...