10 BSORREN FE VESSELS.. Il.1.

Sr C7 LT. PE

THE ABSORBENT VESSELS OF VEGETABLES.

1. Roo!s, leaves, bark, Jep-wood, fhewn to abforb by not moifening them, by placing them in water. 2. Abjorbent vefels coloured by à decoftion of madder, by dilute ink. They form a ring in the fap-wood beneatb the bark, with à ring of arteries exterior to them. 3. Abforbents erroncoufly believed to be air-veffeis, are vifibly Jull of Jap-juice in a vine-Jialk.. Vegetable veffels bave rigid fides, wbich do not collapfe, and bence become full of air wben cut; not Jo in animal veffels. 4. Some horizontal veffels in trees are truly air-veflels for the embryon bud, like tbe air in the broad end of the egg. S. Abjorbent veffels confift of long cylinders; air will pafs through them either way in the dead vepetable; are not réfpiratory organs, as they exil in the roots of trees. May receive air diffolved in water. 6. Abforbent veffels alt either direff or retrograde. À forked branch in water. An inverted tree. À fufpended tree. So in tbe operation of an emetic À and in ruminaling cows. 7. They confift of a fpiral line without valves; and by” 115 vermicular contraftion

forcibly carry on their contained fluids either way. 8. Thofe of the root aff occa- Jionally in winter; but vines in bot-boufes muf} bave their roots guarded from fro/t in Jpring. Accumulated ice deffroys trees in Jpring. 9. They fometimes abforb Posfonous fluids, as fpirit of wine, folution of arfenic, vitriolic acid; roots Jaid to

creep afide from bad foil erroncous. 10. Abforbents of trees like the receptacle of chyle.

La || ll LA |

ne ve- 7

. THE exiftence of that branch of the abforbent veftels of vege- _. which refembles the lateals of animal bodies, and Habidee their nutriment from the moift earth, is evinced by their growth, fo

long as moifture is applied to their roots, and their Quick y withering er it is withdrawn.

ER eq De Er- Lier ru

Befides