[47] The apparatus employed is illustrated and fully described in Brown-Sequard's Archives de Phys., Vol. I, 498, June, 1868. By it the 1-4000th of a degree Centigrade may be indicated. [48] L. H. Wood, "On the influence of mental activity on the excretion of phosphoric acid by the kidneys." Proc. Conn. Med. Soc., Nov., 1869, p. 197. [49] _Loc. cit._, p. 24. [50] Address of Dr. F. A. P. Barnard, as retiring president, before the Am. Ass. for Adv. of Sci., Chicago meeting, Aug. 1868. "Thought cannot be a physical force, because thought admits of no measure." [51] Derivation hypothesis of life and species, forming fortieth chapter of his Anatomy of Vertebrates, republished in Am. Jour. Sci., II, xlvii, 33, Jan. 1869. [52] Prehistoric Times, p. 354, by Lubbock. [53] Madness in Animals, Jour. Mental Sci., July, 1871. Dr. W. L. Lindsay. [54] Facultés Mentales des Animaux, 1872, Tom. XI, p. 181. [55] Primeval Man, 1869, pp. 145-147. [56] Prehistoric Times, 1865, p. 473. [57] "Conferences ser les Théorie Darwinienne," 1869, p. 132. [58] Philosoph. Trans., 1773, p. 262. [59] Prof. Whitney, p. 309. [60] Phys. and Pathol. of Mind. Dr. Maudsley. 3d ed., 1868, p. 199. [61] Nature, January 6, 1870, p. 257. [62] Problems i. 21. [63] Johnson's Cyc. Article "Faith." C. P. Krauth. [64] Darwin's Descent of Man, p. 117. [65] See Descent of Man, p. 96. [66] See Tyndall's Belfast Address. [67] Purgatory of Suicides. [68] Thoughts on Atheism, p. 4. [69] Monologium and Proslogium. [70] Meditations de Primaphilosophia Prop. 2, p. 89. [71] Demonstration of the Being and Attributes of God. [72] Elements of Psychology. [73] Thoughts on Atheism, by Holyoake, p. 4. [74] Proverbs xvii. 22. [75] Henry Ward Beecher. [76] See W. T. Harris. Johnson's Encyc. "Soul." [77] Unseen Universe. [78] Rood. "Sound," Johnson's Encyc. [79] See R. G. Ingersoll's Lecture on Hell. [80] Savage. [81] "The Unseen World." John Fiske, p. 21. [82] Fortnightly Review, June 1875, p. 784. [83] Ninth Bridgewater Treatise. [84] Of the Unseen Universe. [85] Anagram. Nature, Oct. 15, 1874. [86] Of the Unseen Universe. [87] Fiske. Unseen World, p. 52. [88] Savage. Relig. of Evol., p. 246. [89] 1 Corinthians, xv., verses 50-54 (Part of). _Revised English Ed._, 1877. Transcriber's Notes: Passages in italics are indicated by _underscore_. Passages in bold are indicated by =bold=. Numbers enclosed in {brackets} are subscripted in the original text. Additional spacing after some of the quotes is intentional to indicate both the end of a quotation and the beginning of a new paragraph as presented in the original text. Images have been moved from the middle of a paragraph to the closest paragraph break. The following misprints have been addressed: "Hæckel" standardized to "Haeckel" (page 57) missing "the" added (page 91) "paleontology" standardized to "palæontology" (page 108) "cerebelbellum" corrected to "cerebellum" (page 113)