sture and juice arise from the difference of particles
and various other causes, and they are discriminated by the various
particles that feed them. And this is apparent in vines for the
excellence of wine flows not from the difference in the vines, but from
the soil from whence they receive their nutriment.

CHAPTER XXVII. OF NUTRITION AND GROWTH.

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
only a mere infancy.

CHAPTER XXVIII. WHENCE IT IS THAT IN ANIMALS THERE ARE APPETITES AND
PLEASURES.

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

Erasistratus gives this definition of a fever: A fever is a quick motion
of blood, not produced by our consent, which enters into the vessels,
the seat of the vital spirits. This we see in the sea; it is in a
serene calm when nothing disturbs it, but is in motion when a violent
preternatural wind blows upon it, and then it rageth and is circled with
waves. After this manner it is in the body of man; when the blood is
in a nimble agitation, then it falls upon those vessels in which the
spirits are, and there being in an extraordinary heat, it fires the
whole body. The opinion that a fever is an appendix to a preceding
affection pleaseth him. Diocles proceeds after this manner: Those things
which are internal and latent are manifested by those which externally
break forth and appear; and it is clear to us that a fever is annexed
to certain outward affections, for example, to wounds, inflaming tumors,
inguinary abscesses.

CHAPTER XXX. OF HEALTH, SICKNESS, AND OLD AGE.

Alcmaeon says that the preserver of health is an equal proportion of the
qualities of heat, moisture, cold, dryness, bitterness, sweetness, and
the other qualities; on the contrary, the prevailing empire of one above
the rest is the cause of diseases and author of destruction. The direct
cause of disease is the excess of hea