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Updated: May 18, 2025
This view is still maintained by those who differentiate two acts of fertilization within the embryo-sac, and regard that of the egg by the first male-cell, as the true or generative fertilization, and that of the polar nuclei by the second male gamete as a vegetative fertilization which gives a stimulus to development in correlation with the other.
But historical geology alone could never have led to the dynamical phase of modern biology. Three other conceptions have contributed in an even greater degree to the development of this science. ==Conservation of Energy==. The first of these was the doctrine of conservation of energy and the correlation of forces.
Militarists offer new schemes of competitive armament. Marxians offer the Third Internationale and industrial revolution. Sentimentalists offer charity and philanthropy. Coordination or correlation is lacking. And matters go steadily from bad to worse. The first essential in the solution of any problem is the recognition and statement of the factors involved.
Light is produced by the excitement of the optic nerve, and it shines only in our brain; as to the excitement itself, there is nothing to prove that it is luminous; outside of us is profound darkness, or even worse, since darkness is the correlation of light.
A grand and almost untrodden field of inquiry will be opened, on the causes and laws of variation, on correlation, on the effects of use and disuse, on the direct action of external conditions, and so forth. The study of domestic productions will rise immensely in value.
Yet this apparently great increase of subjects in the number of studies actually lessens the amount of work required of the child, because all these different activities, by means of what is called correlation, are brought to bear upon the same subject.
And even if it were possible to imagine such an aggregation and imagine its management and correlation, just think of the area that it would have to occupy! How many of the men would be engaged, not in producing, but in merely carrying from place to place what the other men had produced?
He now proposes to thrust us into a larger and much more intricate sphere of activity as to the representation in the cortex of other changes which as he has described are inframicroscopical or inframacroscopical. In other words, there must be some type of correlation between the projection in the cerebral structure of the organ itself which is cerebrally represented and certain mental signs.
In the name of sweet charity, gay gauzy-winged butterflies of fashion harnessed themselves in ropes of roses, and dragged the car of benevolence; as painted papillons drew chariots of goddesses on ancient classic walls; so in the realm of social economy the ubiquitous law of correlation of industrial force of conservation of energy transmuted the arrested labor of the rich and idle into the fostering heat that stimulated the working poor.
Schaaffhausen, Prof., on the development of the posterior molars in different races of man; on the jaw from La Naulette; on the correlation between muscularity and prominent supra-orbital ridges; on the mastoid processes of man; on modifications of the cranial bones; on human sacrifices; on the probable speedy extermination of the anthropomorphous apes; on the ancient inhabitants of Europe; on the effects of use and disuse of parts; on the superciliary ridge in man; on the absence of race-differences in the infant skull in man; on ugliness.
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