Part 13

Pop. Sci. Monthly, June, 1879, p. 250.

See Sci. Am., May 18, 1878.

Source of Muscular Power, Proc. Roy. Inst., June 8, 1866. Am. I. Sci., II, xlii, 393, Nov. 1866.

Comparative Zoology, p. 45.

Correlation of the Vital and Physical Forces, p. 54.

On the time required for the transmission of volition and sensation through the nerves, Proc. Roy. Inst.

Comparative Zoology, p. 165.

Sci. Amer., Nov. 13, 1876, p. 328.

Marshall, Outline of Physiology. Amer. Ed., 1868, p. 227.

Macmillon's Magazine, Pop. Sci. Monthly, April, 1876.

"Principles of Psychology," 1869, No. 20, p. 24.

J. S. Lombard, N. Y. Med. Jour., Vol. V, 198, June, 1867.

Loc. cit., p. 23.

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.

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.

Loc. cit., p. 24.

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."

Derivation hypothesis of life and species, forming fortieth chapter of his Anatomy of Vertebrates, republished in Am. Jour. Sci., II, xlvii, 33, Jan. 1869.

Prehistoric Times, p. 354, by Lubbock.

Madness in Animals, Jour. Mental Sci., July, 1871. Dr. W. L. Lindsay.

Facultés Mentales des Animaux, 1872, Tom. XI, p. 181.

Primeval Man, 1869, pp. 145-147.

Prehistoric Times, 1865, p. 473.

"Conferences ser les Théorie Darwinienne," 1869, p. 132.

Philosoph. Trans., 1773, p. 262.

Prof. Whitney, p. 309.

Phys. and Pathol. of Mind. Dr. Maudsley. 3d ed., 1868, p. 199.

Nature, January 6, 1870, p. 257.