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muft find within the narrow 

 compafs of the fpace it occupies 

 every thing which is wanted for it-f 

 felf, and to fulfil the office which 

 has been dictated to it by the Au- 

 thor of nature. It is obliged to 

 fpread the numberlefs filaments of 

 its root through the furrounding 

 ground, as fo many fiphons to pump 

 up the juice, which prefents itfelf 

 to thofe filaments ; and thefe fila- 

 ments are fufficient to afford all 

 that the greateft part of trees want 

 in the winter. But, being deftined 

 in the fummer-time to more impor- 

 tant offices, the tree fpreads through 

 the air thofe numberlefs fans, dif- 

 pofing them, in the mpft advan- 

 tageous manner imaginable, to in-* 

 cumber each other as little as pof- 

 fible in pumping from the fur- 

 founding air all that they can ab- 



