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Just as the old embryologists conceived the adult individual to be contained with all its organs to the most minute details within the protoplasm of the fertilised ovum or one of the gametes, so the modern Mendelian, because he is unable to conceive or to obtain the evidence of the gradual development of a hereditary factor, conceives all the hereditary factors of the whole animal kingdom packed in infinite complexity within the protoplasm of the primordial living cells.
In the absence of proofs furnished by the concurrent testimony of embryologists during the last thirty or forty years, who would have believed that the brain arises from an infolded tract of the outer skin, which, sinking down beneath the surface, becomes imbedded in other tissues and eventually surrounded by a bony case?
The eye might not be so cleverly made as Paley thought, but it was made somehow, by somebody. And then my argument with Father Addis began all over again. It was easy enough to say that every man makes his own eyes: indeed the embryologists had actually caught him doing it. But what about the very evident purpose that prompted him to do it?
The iron-faced suffragist propagandist, if she gets a man at all, must get one wholly without sentimental experience. If he has any, her crude manoeuvres make him laugh and he is repelled by her lack of pulchritude and amiability. They have to put up with the sort of castoffs who are almost ready to fall in love with lady physicists, embryologists, and embalmers.
But Wolff had no immediate successors. The school of Cuvier was lamentably deficient in embryologists; and it was only in the course of the first thirty years of the present century, that Prevost and Dumas in France, and, later on, Doellinger, Pander, Von Baer, Rathke, and Remak in Germany, founded modern embryology; while, at the same time, they proved the utter incompatibility of the hypothesis of evolution, as formulated by Bonnet and Haller, with easily demonstrable facts.
Another method of retracing the lost early chapters in the development of life is furnished by embryology. The value of this method is not recognised by all embryologists, but there are now few authorities who question the substantial correctness of it, and we shall, as we proceed, see some remarkable applications of it.
At the present day it may be said that the principle of the voluntary control of procreation, not for the selfish ends of the individual, but in order to extinguish disease, to limit human misery, and to raise the general level of humanity by substituting the ideal of quality for the vulgar ideal of mere quantity, is now generally accepted, alike by medical pathologists, embryologists and neurologists, and by sociologists and moralists.
Many embryological investigations were performed during the eighteenth century, but most relate to the controversy regarding epigenesis and preformationism as the true expression of embryonic development. Withal, the seventeenth-century embryologists, and particularly the embryologists of seventeenth-century England, had contributed much to the progress of the discipline.
Better still if embryologists could discover something which would enable midwives unfailingly to recognize Strong Men at birth. It would be easy then to issue to those ladies secret but specific instructions. There is a street which turns abruptly from my straight road to the station. It goes like a sudden resolution to get out of this daily hurry and excitement. It is a pre-war street.
Nothing was so astonishing and significant in the discoveries of the embryologists, nor anything so absurdly little appreciated, as this recapitulation, as it is now called: this power of hurrying up into months a process which was once so long and tedious that the mere contemplation of it is unendurable by men whose span of life is three-score-and-ten.
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