Volume 1

A picture book of evolution / by Dennis Hird.

  • Dennis Hird
Date:
1906-1907
Catalogue details

Licence: Public Domain Mark

Credit: A picture book of evolution / by Dennis Hird. Source: Wellcome Collection.

    52/220 page 40
    4° tides, of course, for there is no water in the moon, nor now bodily tides in the solid moon. But the moon was not solid then, or it would not have left the earth ; and when it was first thrown off it must have been very near the earth, though, owing to the tides caused by the satellite on its planet, and by the planet on its satellite, great changes are pro¬ duced in their relative motion. Fig. 32.—The Relative Sizes of the Earth and the Moon. (After Flammarion.) By this powerful attraction each tries to bring the rotation of the other into harmony with the period of revolution of the pair round each other. Owing to this law, very great changes will occur in the earth’s movements. Professor Turner points out : “ Something like fifty-seven million years ago
    digitised image 1
    digitised image 2
    digitised image 3