He published at Oxford in 1668 two tracts, on respiration and rickets, and in 1674 these were reprinted, the former in an enlarged and corrected form, with three others "De sal-nitro et spiritu nitro - aereo," "De respiratione foetus in utero et ovo," and "De motu musculari et spiritibus animalibus" as Tractatus quinque medico-physici.
Most mammals with a complicated type of dentition; these milkteeth being shed at a comparatively early period (occasionally even in utero), when they are succeeded by the larger permanent series, which is the only other ever developed.
The general causes embrace certain states of the system which are apt to exercise a more or less direct influence upon the progress of utero-gestation.
Lysias maintained, in one of his pleadings quoted by Harpocration, that forced abortion could not be considered homicide, because a child in utero was not an animal, and had no separate existence.
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