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446 VEGENABEE CIRCOELAWON. NSöTE? XSOZVE We Thus the vegetable circulation, complete in the lungs, M 5 but probably in the other part of the ſyſtem deficient in uni reſped to a ſyſtem of returning veins, is carried forwards ür 4 without a heart, like the circulation through the livers of 10. animals where the blood brought from the inteſtines and Hun meſentery by one vein is diſperſed through the liver by wer the vena portarum, which aſſumes the office of an artery. hy, See note XXXVII. ie 0m At the ſame time ſo minute are the veſſels in the inter- km? texture of the barks of plants, which belong to each indi-| 0 vidual bud, that a general circulation may poſſibly exiſt,| wen though we have not yet been able to diſcover the venous min part of it.| Since the above opinion was firſt publiſhed, I have ver again attended to this ſübje&, and now think that the cord greater diſcharge of the milky blood from the upper part be p | of the plant, than from the lower part, might be ra- 10 fü tlonally aſcribed to the defcending arteries of the ſtem| erd bleeding more rapidly and more copiouſy than the aſcend-) Tie ing veins. And yeſterday, September 28, 1798, a cup-| ane ful of decodttion of madder, rubia tin&orum, was carried(zw into the garden, and placed near a plant of tragopogon[us latifolium, or ſcorzonera, which was then in Bower; a large ſri] ſtem of the plant was then cut aſunder, and the growing the end was bent down and immerſed an inch or two into the wf y coloured decodction, along with the lower end of the top,"“ or part cut of, After about a minute they were taken theſes out and inſpected by a common lens, when an internal' dil circle of red points was viſible in both of them, with an is

external circle of veſlels, which continued to effuſe white