Note 79 — Chapter VIII · LAMARCK’S WORK IN GEOLOGY

Hooke had previously, in order to explain the presence of tropical fossil shells in England, indulged in a variety of speculations concerning changes in the position of the axis of the earth’s rotation, “a shifting of the earth’s centre of gravity analogous to the revolutions of the magnetic pole, etc.” (Lyell’s Principles). See also p. 132.