2 . P. Dominki Sanguineti Apfuli Dijfertatime^ 
THe Theory oi Medicine has been ftrangely alter d in 
the prefent Age, that it appears at firft view a New 
Science. The Jargon of Hot, Cold, Moift, Dry, is be- 
come obfolete ^ inftead of thefe, all the talk now is of 
Acid and Alkali 5 and from thefe Famous Principles the 
Modern Writers derive all ElFefts of Natural Bodies* But 
let thefe men take heed that they do not deceive them- 
felves with Empty and Infignificant Names 5 a^ for our 
Author, he is perfwaded thefe Chymical Notions are Pre- 
carious, and no kfs unfatisfaftory than the exploded Fidi- 
ons of Firft Qualities, Mixture, Temperament, &c. 
Thothe Terms of Acid and Alkali may feem new, yet 
the Notions, or at leaft fomething not very unlike them, 
are to be met with in feveral Writers in diflferent Ages^: 
Hippocrates, Galen and others, afcribe the Origin of many 
Difeales to unnatural, fowre and corroGve Juices in the 
Body, &c. But to come nearer to our purpofe. Eippo^ 
crates in his Book de Di£ta has this paflage, But Man^ as 
aU other Animals, is formed and confifts of two Principles of 
a contrary Nature, which agree and concur in their effe^^, 
Fire and Water^ Thefe in ConjunSion are fufficient to give 
Being to all Things, tho neither is alone. Thefe words Ta- 
chenius adapts to, and interprets of his Acid and Alkali, 
which he thinks fufScient to account for the produftion 
of all Bodies, and the Appearances obfervable in them* 
To illuftrate this Refemblance in a more particular 
manner. Plato in his T/W^/ defcribes the Particles of Fire 
as Pyramidal,and Reafoning of its EfFedSj fays that by the 
Sharpnefs of its Angles, the Subtilty of its Sides, the Mi- 
nute- 
