( 118 ) 
Porta than in the Trunk of the ‘‘Mefentorick Artery, 
and tlie Blood which comes from the Spleen to the Li*' 
ver, moves 200 times flower m the Spleen than in the 
beginning of the Spienkk Ai iery ; and from thence 
deefnees tlie long fought fbr^U fe . of the Spleen and Porta ; ^ 
So produ6five is oneTirtiple truth of many others/ 
There is another contrivance for diminilhlng the Ve- 
locity of die Blood- in the Teificles, which the Author 
explains, and fliows that the Blood mull: be 150 times 
longer in pa (Ting to rhje Teifioles the way it does, than 
if it had gone according to thepmmon Cgurjeof Na- 
ture. After this tlie Author proceeds to explain the 
ways of forming other Secretions, as the . . . of the- 
Ear, the Lymph, and Animal Spirits. He fliows like- 
wife, how from the Do6frine of AttraiEfion the Opera- 
tion of M^dicihes,' which alter the quantity of Secreti- 
ons, may be explained ; for Medicines that encreafe the 
quantity of any Secret! A, operate by uniting to and 
augmenting the Attradhe force of the Particles, that 
compofe the Humoursvto be fecerned, which may be 
more e^ffually done b\ the Particles of one fort of 
Medicine dia'h tliofeof another^ and therefore different 
Humours w ill require different Purgatives to carry diem, 
off through the Glands of the Inteifines ; w;fiich Con- 
fideraticm will re-elfablirh-theDodfnne of SpecifickPurges, . 
which , was confirm’d to Aie Ancients by Experience and 
Obfervatlon,' but rejeddd by -the Moderns tllro’ a falfe 
Philofophy. - - '■i i > 
He proceeds after this, to fhow how necefTary the 
Do6triiie o£ Secretion founded on^Attradion is, for the - 
uhderftanding x)f the Nature of Dileafes^ and gives us 
an example in a Diabetes. He likewiife explains from it 
fome of the Sytnptoms of Rheumatifms, Gout, and 
Stone ; as alfo the Operations of Medicines in the HtN 
mane Body, efpecially the attenuaters and thickners of 
the 
