Note 2837 — BOOK XVII. THE NATURAL HISTORY OF THE CULTIVATED TREES.
John Bostock translation
In allusion to what Virgil says, Georg. ii. 254:—
“Quæ gravis est, ipso tacitam se pondere prodit, Quæque levis——”
Fée remarks, however, that it is easy enough to analyse the earth, and ascertain the proportions of humus, and of the siliceous, cretaceous, or argillaceous earths; the relative proportions of which render it strong or light, as the case may be.