[11] περι καρδιης.
[12] Especially in the περι γονης.
[13] The three works περι γονης, περι φυσιος παιδιου, περι νουσων δ, On generation, on the nature of the embryo, on diseases, book IV, form really one treatise on generation.
[14] περι φυσιος παιδιου, On the nature of the embryo, § 13. The same experience is described in the περι σαρκων, On the muscles.
[15] περι φυσιος παιδιου, On the nature of the embryo, § 29.
[16] περι φυσιος παιδιου, On the nature of the embryo, § 22.
[17] Ibid. § 23.
[18] It is possible that Theophrastus derived the word pericarp from Aristotle. Cp. De anima, ii. 1, 412 b 2. In the passage το φυλλον περικαρπιου σκεπασμα, το δε περικαρπιον καρπου, in the De anima the word does not, however, seem to have the full technical force that Theophrastus gives to it.
[19] Historia plantarum, i. 2, vi.
[20] Ibid. i. 1, iv.