CHAPTER III

THE ANIMAL MACHINE

For further insight into the activities of the animal machine, the reader may refer to various chapters on the progress of physiology and anatomy in earlier volumes. The following references will guide to the accounts of the successive advances from the earliest time:

Vol. I., pp. 194, 195 describe briefly the earlier anatomical studies of the Alexandrian physicians, Herophilus and Erasistratus; and pp. 282, 283, outline the studies of the famous physician, Galen.

Vol. II., "From Paracelsus to Harvey," in particular, p. 163 _seq._; and chapters IV. (p. 173 _seq._) and V. (p. 202 _seq._) dealing with the progress of anatomy and physiology in the eighteenth and nineteenth centuries respectively. The chapter on "Experimental Psychology" (p. 245 _seq._) may also be consulted.

Vol. V., chapter V., dealing with the Marine Biological Laboratory at Naples (p. 113 _seq._) and chapter VI., "Ernst Haeckel and the New Zoology" (p. 144 _seq._) present other aspects of physiological problems.