Note 254 — Chapter XIV

Dr. Carus, in the memoir already quoted, says:—“But since, in the organization of the earth, light and air, as constituting a second integrant part, stand opposed to gravitation, and since the plant bears a relation, not only to gravitation, but to light also, when its formation is complete it will necessarily present a second anatomical system, namely, that of the spiral vessels, which have been very justly considered, of late, as the organs that perform in plants the functions of nerves.”