Note 855 — COLLECTIONS OF NATURAL CURIOSITIES.
William Johnston translation
Plin. lib. xxxi. cap. 9. Isidorus Origin. lib. xvi. cap. 2. Nitre also was employed for the like purpose. Plin. lib. xxxi. cap. 10. Herodot. lib. ii. Sextus Empiricus in Pyrrhon. Hypotypos. cap. 24. The last author ascribes this custom to the Persians in particular.