( 245 °) 
thicknefs in’ the Bark, confifted in nothing elfe than of 
Veffels which were difpofed Horizontally in the fa id 
Bark 3 and entring a little further into the Bark, I found 
bat very few of the above mentioned long Particles, but 
the further I came, the thicker they lay, till at laft I 
found 'em as numerous as in other Barks : And whereas 
all other Barks of the Ch 'na Chin £ are fo heavy that they 
fink in Water or Brandy, this Bark which was ftnooth. 
Twain, and tho’ I thruft it under the Brandy yet it vvould 
.emerge frequently. 
Whether the China Chins be of two forts of .Trees is 
not now the Subject of my Enquiry, but in the mean 
time I judge by thofe pieces of Bark which I had, that 
they are for the mofl part taken from the extream part 
of the Bark, which is in a manner perifht, for want of 
enjoying any longer itsflourifhment from the Treej and 
-fince as 1 told you before, that fmooth Bark which I had 
fteeped feme days, in Brandy, would not fubfide, but 
floated therein almoft equal with the Superficies, one 
would be apt to conclude, that the heavinefs of the 
Bark depended on the Multiplicity of thofe long Parti* 
eles deferibed by Fig 1, 
Now that you may have a true Idea of the above 
mentioned Veffels, I caufed a fmall part of them to be 
drawn, as in Fig. 3. K L O P, which Veffels fo deferibed, 
lay very near the Extremity or outfide of the Bark, and 
in which the Painter could difeover but three long Parti- 
KM, P N and PO. 
Several Perfons feeing thefe kind of Figures would be 
enclin’d to think that they were not Veffels, being una- 
ble to conceive how the Saps can be carried thro' fuch 
Oval Particles which feem to be fhut up quite round 5 
but if they confidered, that in divers Plants, and in fome 
Woods, there are found a fort of Covers to their Vef- 
fels, which are as ValvttU , and ferve to hinder the pro*. 
truded 
