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Updated: May 25, 2025
Her recollections intercrossed, scenes that were trivial ousted others that were grave; the purple limpets of Sidon, the shrine of Ashtaroth, the invective at Bethsaïda, the transfiguration on the mountain height, the cure of lepers, and the presence that coerced. Yet through them all certain things remained immutable, and of these, primarily her contact with the Christ.
Seeing this difference in the process of selection, as carried on by man and nature, we need not be surprised at some difference in the result. I have as yet spoken as if the varieties of the same species were invariably fertile when intercrossed.
These will have intercrossed and left offspring, either inheriting the same bodily peculiarities, or with a tendency to vary again in the same manner; while the individuals less favoured in the same respects will have been the most liable to perish.
Giant aisles intercrossed their heights above him; myriads of mighty pillars, fantastically carven, filed away to invisibility behind the yellow illumination of torch-fires. Strange images, weirdly sensuous, loomed up through haze of incense.
The following case is far more remarkable, and seems at first quite incredible; but it is the result of an astonishing number of experiments made during many years on nine species of Verbascum, by so good an observer and so hostile a witness, as Gärtner: namely, that yellow and white varieties of the same species of Verbascum when intercrossed produce less seed, than do either coloured varieties when fertilised with pollen from their own coloured flowers.
Nevertheless the perfect fertility of so many domestic races, differing widely from each other in appearance, for instance, those of the pigeon, or of the cabbage, is a remarkable fact; more especially when we reflect how many species there are, which, though resembling each other most closely, are utterly sterile when intercrossed.
With poppies the various varieties are so often intercrossed by bees, that the appearance of an accidental change may sometimes be produced, and in the houseleek the pistilloid warily seems to be the ordinary one, the normal strain being very rare or perhaps wholly wanting. Our three illustrative examples are good and permanent races, producing their peculiar qualities regularly and abundantly.
Nevertheless the perfect fertility of so many domestic varieties, differing widely from each other in appearance, for instance of the pigeon or of the cabbage, is a remarkable fact; more especially when we reflect how many species there are, which, though resembling each other most closely, are utterly sterile when intercrossed.
The males which were the handsomest or the most attractive in any manner to the females would pair oftenest, and would leave rather more offspring than other males. The offspring of the former, although variously intercrossed, would either inherit the peculiarities of their fathers or transmit an increased tendency to vary in the same manner.
With respect to the almost universal sterility of species when first crossed, which forms so remarkable a contrast with the almost universal fertility of varieties when crossed, I must refer the reader to the recapitulation of the facts given at the end of the ninth chapter, which seem to me conclusively to show that this sterility is no more a special endowment than is the incapacity of two distinct kinds of trees to be grafted together; but that it is incidental on differences confined to the reproductive systems of the intercrossed species.
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