204 CHAPTER 1 6. 
xverc found to be the bed adapted to the 
purpofe, from their bleeding moft freely. 
The experiments of Mr. Ray and Mr, 
WiLLUGHBY, which Were printed in the 
fourth volume of the Phihfophical 'Tranf- 
eUionsy proved the 2.{Qtv\t and defcent, as 
wxU as the lateral courfe, of the fap ; but 
thefe gentlemen declined giving any deci- 
five opinion, as to a real circulation up- 
wards by the vefiels of the wood, and 
do w^n wards by thofe bStween the wood 
and the bark ; which v/as the doflrine main- 
tained foon after this time by Grew and 
Malphigi, and indeed afterwards adopt- 
ed by Mr. Ray himfelf. 
This doftrine of the circulation of the 
fap, I need fcarcely remark, gave way to 
the experiments of Dr. Hales and others ; 
which teaches, that the fap rifes and falls. 
In the fame fyftem of veiTels, as it is affedled 
by the joint operations of air and warmth. 
Yet there have not been wanting ingenious 
men of late years, aifo, who, conceiving the 
analogy betv/een animals and vegetables to 
be greater than is ufually imagined, and 
€ven that plants not only live, but feel,, have 
advanced^ 
