Conversations on Chemistry, V. 1-2 / In Which the Elements of that Science Are Familiarly Explained and Illustrated by Experiments

by Mrs. Marcet

[Plate XV.]

Vol. II. p. 250

Fig. 1 & 2. A.B Cotyledons. C Envelope. D Radicle.
Fig. 3. A.B Cotyledons. C Plumula. D Radicle.
Fig. 4. A.B. Cotyledons. C Plumula. D Radicle.

[Larger view] (complete Plate)

EMILY.

Here are some lupines that are just making their appearance above ground.

MRS. B.

We shall take up several of them to observe their different degrees of progress in vegetation. Here is one that has but recently burst its envelope—do you see the little radicle striking downwards? ([Plate XV.] Fig. 2.) In this the plumula is not yet visible. But here is another in a greater state of forwardness—the plumula, or stem, has risen out of the ground, and the cotyledons are converted into seed leaves. ([Plate XV.] Fig. 3.)

CAROLINE.