Book 2
PART 2
2
Let me draw his attention, then, once again, even if he does not wish it, to the kidneys, and let me state that these confute in the very clearest manner such people as object to the principle of attraction. Nobody has ever said anything plausible, nor, as we previously showed, has anyone been able to discover, by any means, any other cause for the secretion of urine; we necessarily appear mad if we maintain that the urine passes into the kidneys in the form of vapour, and we certainly cut a poor figure when we talk about the tendency of a vacuum to become refilled;Horror vacui this idea is foolish in the case of blood, and impossible, nay, perfectly nonsensical, in the case of the urine.But Erasistratus had never upheld this in the case of urinary secretion. cf. p. 99.
