[1552] Spec. nat., VIII, 84-85. In our chapter on The Pseudo-Aristotle we have discussed the addition of the passage to the fourth book of the Meteorology.

[1553] Spec. nat., VIII, 81-83.

[1554] Spec. doctr., XI, 105-107 and 132.

[1555] HL XVIII, 459.

[1556] Berthelot (1893), I, 280-87.

[1557] Books X-XV deal with herbs and trees, while only VIII-IX are devoted to metals, minerals, and gems.

[1558] Spec. nat., XIV, 70; XV, 65.

[1559] Spec. nat., X, 50.

[1560] Ibid., XVII, 35, 45, 105, 135.

[1561] Ibid., XXI, 63.