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VI NoTE XXXVII. VEGETABLE RESPIRATION.“- 453 ve ery ſimilar to that of fiih. In fiſh the blood after having palled through their gills does not return to the heart as 4 from the(ungs of air-breathing animals, but the pulmo- lately| nary vein taking the ſtrutture 6 an artery after having vered received the blood from the gills, which there gains a Por- more forid colour, diſtributes it to the other parts of 176= their bodies. The ſame ſtrutture occurs in the livers of filh, whence we ſee in thoſe animals two circulations in- vo,| dependent of the power of the heart, viz. that beginning Gar| at the termination of the veins of the gills, and branching Wei| through the muſcles, and that which paſies through the edpla liver; both which are carried on by the ation 47 thoſe en| reſpective arteries and veins. Monro's Phyſiology of Fiſh, un83, P- 6 au"The courſe of the Auilds in the roots, leaves, and buds| of vegetables ſeems to be performed in a manner ſimilar; Dea to both theſe. Firſtthe ablorbent veſſels of the roots and| die| ſurfaces unite at the footſtalk of the leaf; and then, like/ Ji the Vena Me an artery commences without the in-| face tervention of a heart, and ſpreads the ſap in its numerous"4 «as ramifications on the upper ſurface of the leaf; here Jene Changes its colour and properties, and becomes ien noe| blood; and is again collected by a pulmonary vein on the a| ünderdurface:of rhe-Jeafs Thiweinglikeichat en re- found| ceives the blood from the gills of fiſh, alumes the ofice erd| and name of an artery, and branching again ZE& he

blood upward to the bud from the footſtalk of the leaf, and | downward to the roots; where it 13 all expended in the

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