Note 211 — Chapter VI
Reading edition
Tyndall's Earlier Thoughts; in his Essays, p. 72. Dr. Tyndall is never weary of repeating this useful truth, and we may honour him for so doing. The following references are to his last very popular work, and in each place the same thought will be found differently expressed according to the difference of subject-matter. Fragments of Science, pp. 93, 105, 121, 163, 442.