26 On the MO T 1 N of 



was only of three or two years growth ; and moft readily of all 

 in the laft year's moots. At the fame time, the bark refufed to 

 feparate freely in the above branch, where its growth was feven 

 years old, and was ftill more adhefive in the trunk, which was 

 about twenty years growth, and half a foot in diameter. 

 COR. 19. Were it not for the light obtained by the former expe- 

 riments, we might be led to conclude from this trial, that the 

 fap which appears in fpring, between wood and bark, defcends 

 from the extremities of a tree towards the root, and probably 

 in a way of circulation : But we have found, that the fap 

 which runs in fpring, between wood and bark, afcends diredl- 

 ly, and in a very gradual manner, from the root. The refult of 

 this experiment, therefore, coincides exactly with the above 

 obfervation, and mews, that the younger wood does power- 

 fully draw off the fap from the older : That, by draining the 

 trunk, the fap accumulates in the branches ; and that, in 

 young wood, we find a greater quantity of fap than in the 

 older wood through which it has paffed in its way from the 

 root. 



APRIL 3,. 



Thermometer, at noon, 49. j at midnight, 44. 

 No obfervation becaufe of rain. 



APRIL 4. 



Thermometer, at noon, 53. ; at midnight, 44. 

 THE tenth incifion bled this day, but very fparingly. The 

 inverted branch D E bled at E. The incifions on the branch B 

 bled at their under factions, and alfo at their upper fections, but 

 in much lefs quantity. 



OBS. 29. This laft appearance feems to favour the idea of a cir- 

 culation, if it might be fuppofed, that the fap, which iffues 

 from the upper fections of the incifions, is the effect of a re- 

 gular return from the vipper extremities of the tree. But it 



is 



