Alfred North Whitehead book Process and Reality
Pt. II, ch. 1, sec. 1.
Source: 1920s, Process and Reality: An Essay in Cosmology (1929)

Process and Reality is a book by Alfred North Whitehead, in which the author propounds a philosophy of organism, also called process philosophy. The book, published in 1929, is a revision of the Gifford Lectures he gave in 1927–28.
Alfred North Whitehead book Process and Reality
Pt. II, ch. 1, sec. 1.
Source: 1920s, Process and Reality: An Essay in Cosmology (1929)
Alfred North Whitehead book Process and Reality
Source: 1920s, Process and Reality: An Essay in Cosmology (1929), Chapter IV, p. 310 https://books.google.com/books?id=uJDEx6rPu1QC&pg=PA310.