Note 759 — BOOK XIII. THE NATURAL HISTORY OF EXOTIC TREES, AND AN ACCOUNT OF UNGUENTS.

See B. xvii. c. 3, where he quotes this passage from Cicero at length. It appears to be from De Orat. B. iii. c. 69. Both Cicero and Pliny profess to find a smell that arises from the earth itself, through the agency of the sun. But, as Fée remarks, pure earth is perfectly inodorous. He suggests, however, that this odour attributed by the ancients to the earth, may in reality have proceeded from the fibrous roots of thyme and other plants. If such is not the real solution, it seems impossible to suggest any other.