[73] “Histoire Naturelle,” tom. ii. ed. ii. 1750, p. 350.
[74] Ibid. p. 351.
[75] See particularly Buffon, l.c. p. 41.
[76] “Exercitationes de Generatione.” Ex. 62, “Ovum esse primordium commune omnibus animalibus.”
[77] In some cases of sexless multiplication the germ is a cell-aggregate—if we call germ only that which is already detached from the parent organism.
[78] Harvey, “Exercitationes de Generatione.” Ex. 45, “Quænam sit pulli materia et quomodo fiat in Ovo.”
[79] Not yet actually demonstrated in the case of phænogamous plants.
[80] As Buffon has well said:—“L’idée de ramener l’explication de tous les phénomènes à des principes mecaniques est assurement grande et belle, ce pas est le plus hardi qu’on peut faire en philosophie, et c’est Descartes qui l’a fait.”—l.c. p. 50.
[81] “Principes de la Philosophie,” Troisième partie, § 45.
[82] “Ethices,” Pars tertia, Præfatio.