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Of Vegetation. 341 



ing the mixture according to the many 

 different purpofes fhc defigns it for j cither 

 for long or more lax fibres of very different 

 degrees in animals, or whether it be for the 

 forming of woody or more foft fibres of 

 various kinds in vegetables. 



The great variety of which different fub- 

 ftanccs in the fame vegetable prove, that 

 there are appropriated vcffcls for conveying 

 very different forts of nutriment. And in 

 many vegetables fome of thofe appropriate 

 vefiels are plainly to be fecn replete either 

 with milky, yellow, or red nutriment. 



Dr. Keillj in his account of animal fecre- 

 tion, page 49, obferves, that where nature 

 intends to feparate a vifcid matter from 

 the blood, ihe contrives very much to retard 

 its motion, whereby the inteftine motion of 

 the blood being allayed, its particles can the 

 better coalefce in order to form the vifcid 

 fecretion. And Dr. Grew, before him, ob- 

 fcrved an inftance of the fame contrivance 

 in vegetables where a fecretion is intended, 

 that is to compofe a hard fubftance, viz. in 

 the kcrnell or feed of hard ftone fruits, 

 which does not immediately adhere to, and 

 grow from the upper part of the ftone, 



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