"I collected birds' eggs. At nine, not a boy in the parish could find more nests in a day than I could. With birdnesting, buying, and now and then begging, I made a collection that figures in a museum over the water, and is entitled 'Eggs of British Birds.' The colors attract, and people always stop at it. But it does no justice whatever to the great variety of sea-birds' eggs on the coast of Britain.英文原著 · 《A Woman-Hater》
Eggs have come down. Yesterday they were nine for a quarter; to-day they're ten. Gildersleeve wants a dollar for a setting of eggs, but he'll let you have the same number of eggs for thirty cents if you'll wait till he can run a needle into each one. So afraid you'll raise chickens of your own.英文原著 · 《Back Home》
It might be argued that in the case of heterogeneous hybridisation the sperm-nucleus does not fuse with the egg-nucleus, and that, therefore, the spermatozoon cannot transmit its hereditary substances to the larvae. But these objections are refuted by Godlewski's experiments, in which he showed definitely that if the egg of the sea-urchin is fertilised with the sperm of a crinoid the fusion of the egg-nucleus and sperm-nucleus takes place in the normal way. It remains for further experiments to decide what the character of the adult hybrids would be.英文原著 · 《Darwin and Modern Science》
Schultze found that if the frog's egg is turned upside down at the time of its first division and kept in this abnormal position, through compression between two glass plates for about 20 hours, a small number of eggs may give rise to twins. It is possible, in this case, that the tendency of the black part of the egg to rotate upwards along the surface of the egg leads to a separation of its first cells, such a separation leading to the formation of twins.英文原著 · 《Darwin and Modern Science》
In the developing eggs of insects the nuclei, together with some cytoplasm, migrate to the periphery of the egg. Herbst pointed out that this might be a case of chemotropism, caused by the oxygen surrounding the egg. The writer has expressed the opinion that the formation of the blastula may be caused generally by a tropic reaction of the blastomeres, the latter being forced by an outside influence to creep to the surface of the egg.英文原著 · 《Darwin and Modern Science》
Kammerer showed that both forms of Salamandra can be induced to lay their eggs early or late, according to the physical conditions surrounding them. If they are kept in water or in proximity to water and in a moist atmosphere they have a tendency to lay their eggs earlier and a comparatively high temperature enhances the tendency to shorten the period of gestation. If the salamanders are kept in comparative dryness they show a tendency to lay their eggs rather late and a low temperature enhances this tendency.英文原著 · 《Darwin and Modern Science》