Book 5
Chapter XXVII. OF NOURISHMENT AND GROWTH.
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EMPEDOCLES believes, that animals are nourished by the remaining in them of that which is proper to their own nature; they are augmented by the application of heat; and the subtraction of either of these makes them to languish and decay. The stature of men in this present age, if compared with the magnitude of those men which were first produced, is no other than a mere infancy.
Chapter XXVIII. WHENCE IT IS THAT IN ANIMALS THERE ARE APPETITES AND PLEASURES.
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EMPEDOCLES says that the want of those elements which compose animals gives to them appetite, and pleasures spring from humidity. As to the motions of dangers and such like things, as perturbations, etc....
Chapter XXIX. WHAT IS THE CAUSE OF A FEVER, OR WHETHER IT IS AN AFFECTION OF THE BODY ANNEXED TO A PRIMARY PASSION.