^^•v. 



i 



the 



trc 



ided 



eto 



in 



tin 



gatth 



e 



e 



13 th 



upper 

 pul. 



e 



hthe 



great 



6 



- roots be. 

 "■forms the 



s and veins 



'tmofphere^ 

 d, and pro- 

 he fpirit of 

 3 branches, 

 ftalk of the 

 mtioned. 

 J of chyle, 



)per 



caudex 



c 



veffels de- 

 ll as thofe 

 the air, and 



:aves. But 



fiftofa^ 



con 



eretifi 

 sred. 



htin^ 



ade a 



T 



ol. 



On tli^ 



3 



theo 



ther» 



ules 



wou 



be 



Sect.V. 6 



AND VEINS 



be produced in the vefl 



of th 



d would thence appea 



higher in thofe vefTels than if the black molecules had been formed 



hyz mixture of the two fluids previous to their abforpt 

 On cutting thefe horizontally (lice after flice with - 

 and infpefting them 



(harp knife 



common lens, th« milky blood 



to ooze, 



before defcribed, from an external ring of the bark ; 

 ing of coloured points was agreeably vifible many inch 

 • but on flicino; the ftem from below up to the inferti( 



and 



th 



ed abforbents of the ftem enlarged at th 



bofoms, I perfuaded myfelf 



I 



i 



up the ftem ; 



of the leaves and buds 



eould perceive the col 

 part where each with the attendant vein changes into a pulmonary 

 artery, and paffes into the leaf, forming three or more of the ribs of 

 it, and thus conftituting the upper part of the caudex gemma. 



Another circumftance was beautifully vifible, which was, that the 

 coloured cyUnder of abfor bent veffels had evidently feparated to allow 

 the new bud to apply its interior termination to the pith; which pro- 

 bably, when it was fecreted by the glands of the caudex of the parent 

 bud, found in this fituation a proper nidus, and due nutriment for its 

 embryon flat 



of the femal 



Some other kinds of experiments I direaed with defign to fhew 

 the part of the lower caudex of each bud, where the branching ab- 

 forbents and veins of the root unite each into one trunk, before they 



. as in the above 



fcend along the bole of th 



and alfo to fhew 



periment 



th 



pper 



udex of each bud 



here the veins are 



joined by the abforbents, and become the pulmofiary arteries of each 

 leaf, but did not fucceed quite to my wilh, though what I could ob 



■ I 



ferve feemed to confirm the above theory. 



peat the experiments with fufficient attentic 



words defcribe the manner of making them, hoping fome one may 



I had 



fu 



but fhall here in few 



ijea 



get able 



be induced to profecute them with fuccefs, and to ii 

 veffels, as the anatomifls do thofe of animals. 



A part of a leaf-flalk, and the joint to which it adhered, w 



9 



about 



^ 



