[481] "Fragments of Science," p. 421.
[482] Contemporary Review, July, 1872.
[483] Grove, "Correlation and Conservation of Forces," p. 20.
[484] Ibid.
[485] Spencer, "First Principles," pp. 235, 252.
[486] Challis, "Mathematical Principles of Physics," p. 681.
[487] Herschel, "Familiar Lectures on Science," p. 461.
[488] Carpenter, "Mental Physiology," p. 703.
[489] Whewell, "Astronomy and Physics," p. 224.
[490] 1 Cor. xii. 6.