"Physical change" Quotes from Famous Books
 ... best understand the probable course of Natural Selection by taking the case of a country undergoing some slight physical change; for instance, of climate. The proportional numbers of its inhabitants will almost immediately undergo a change, and some species will probably become extinct. We may conclude, from what we have seen of the intimate and complex manner in which the inhabitants of each country are bound together, ...
— Library of the World's Best Literature, Ancient and Modern -- Volume 11 • Various
... unalterable attraction, and when they unite, the resultant compound is a body totally unlike either of the constituents. Both substances have disappeared, and a new one has taken their place. This is the magic of chemical change. A physical change, as of water into ice, or into steam, is a simple matter; it is merely a matter of more or less heat; but the change of oxygen and hydrogen into water, or of chlorine gas and the mineral sodium into common salt, is a chemical change. In nature, chlorine and sodium are not found in a ...
— The Breath of Life • John Burroughs
... this unusual and unexpected poultice was really applied to Cephas's wounds, they began to heal. In the course of a month the most ordinary observer could have perceived a physical change in him. He cringed no more, but held his head higher; his back straightened; his voice developed a gruff, assertive note, like that of a stern Roman father; he let his moustache grow, and sometimes, in his most reckless moments, twiddled the end ...
— The Story Of Waitstill Baxter • By Kate Douglas Wiggin
... the probable course of natural selection by taking the case of a country undergoing some physical change, for instance, of climate. The proportional numbers of its inhabitants would almost immediately undergo a change, and some species might become extinct. We may conclude, from what we have seen of the intimate and complex manner in which the inhabitants of each country ...
— On the Origin of Species by Means of Natural Selection • Charles Darwin
... that whatever causes a mental disturbance in the mother leaves its impress on the child. It is fortunate that this old notion is false, as we have shown nothing but a physical change affecting the blood supply can possibly influence the developing organism. Now and then a red "flame" spot or so-called birthmark is found on the new-born child, but this is due always to some physical cause which may be easily explained, never ...
— Parent and Child Vol. III., Child Study and Training • Mosiah Hall |
