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THE Preternatural State OF ANIMAL HƲMOƲRS described, &c.
CHAP. I.
Of Diseases in General, and particularly of those of the Solid Parts.
THE Ancient Doctrine of Hippocrates, divided the Parts of an Animal, into the Containing and Contained: The Containing are the Vessels, and the Parts Con∣tained are the Humours, amongst which we reckon the Spirits, which are also of a Fluid Nature.
The Anatomy of an Embryo evidently con∣firms this Doctrine; for at its first formation and increase in the Egg, there appears nothing but Humours and Membranes containing them, which are plainly of a Nervous Nature.