[[2]] The Riddle of the Universe, Chaps. XIV, XV.
[[3]] Chap. XII.
[[4]] Fragments of Science, p. 222.
[[5]] First Principles, i., pp. 33-39.
[[6]] Essays, Vol. III., pp. 246, f.
[[7]] In an essay written before 1889.
[[2]] The Riddle of the Universe, Chaps. XIV, XV.
[[3]] Chap. XII.
[[4]] Fragments of Science, p. 222.
[[5]] First Principles, i., pp. 33-39.
[[6]] Essays, Vol. III., pp. 246, f.
[[7]] In an essay written before 1889.