(1) "Essay on the Metamorphoses of Plants," by Goethe, translated
for the present work from Grundriss einer Geschichte der
Naturwissenschaften, by Friederich Dannemann (2 vols.). Leipzig, 1896,
Vol. I., p. 194.
(2) The Temple of Nature, or The Origin of Society, by Erasmus Darwin,
edition published in 1807, p. 35.
(3) Baron de Cuvier, Theory of the Earth. New York, 1818, p.74. (This
was the introduction to Cuvier's great work.)
(4) Robert Chambers, Explanations: a sequel to Vestiges of Creation.
London, Churchill, 1845, pp. 148-153.