103 (return) [ A remark to much the same effect was made long ago by
Hippocrates and by the illustrious Harvey; for both assert that a young
animal forgets in the course of a few days the art of sucking, and
cannot without some difficulty again acquire it. I give these
assertions on the authority of Dr. Darwin, Zoonomia, 1794, vol. i. p.
140.]
104 (return) [ See for my authorities, and for various analogous facts,
The Variation of Animals and Plants under Domestication, 1868, vol.
ii. p. 304.]
105 (return) [ The Senses and the Intellect, 2nd edit. 1864, p. 332.
Prof. Huxley remarks ( Elementary Lessons in Physiology, 5th edit.
1872, p. 306), It may be laid down as a rule, that, if any two mental
states be called up together, or in succession, with due frequency and
vividness, the subsequent production of the one of them will suffice to
call up the other, and that whether we desire it or not. ]
106 (return) [ Gratiolet ( De la Physionomie, p. 324), in his
discussion on this subject, gives many analogous instances. See p. 42,
on the opening and shutting of the eyes. Engel is quoted (p. 323) on
the changed paces of a man, as his thoughts change.]
107 (return) [ Mecanisme de la Physionomie Humaine, 1862, p. 17.]
108 (return) [ The Variation of Animals and Plants under
Domestication, vol. ii. p. 6. The inheritance of habitual gestures is
so important for us, that I gladly avail myself of Mr. F. Galton s
permission to give in his own words the following remarkable case: The
following account of a habit occurring in individuals of three
consecutive generations {footnote continues:} is of peculiar interest,
because it occurs only during sound sleep, and therefore cannot be due
to imitation, but must be altogether natural. The particulars are
perfectly trustworthy, for I have enquired fully into them, and speak
from abundant and independent evidence. A gentleman of considerable
position was found by his wife to have the curious trick, when he lay
fast asleep on his back in bed, of raising his right arm slowly in
front of his face, up to his forehead, and then dropping it with a
jerk, so that the wrist fell heavily on the bridge of his nose. The
trick did not occur every night, but occasionally, and was independent
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