CJS7 3 
VI An Account of a BOO K. 
p~*MT*}IE Learned Author declaring himfelf unfatisfied 
1 with the former Hypothecs about the Production 

of Intermitting Fevers, but fuppofing, from the Confe- 
deration of the Symptoms, that their Origine is owing 
to the Nervofum Genus, has, agreeably to that Conje- 
cture, formed to himfelf a new one by which, (having 
revolv'd it long in his Thoughts) he thinks he can give 
himfelf a clearer Account of the reafon both of the Sym- 
ptoms and Method of Cure, (particularly that by the Cor- 
tex Veruvianus) than from what others have laid down.* 
To clear his way to it, he firft takes notice of Four 
Hypothefes concerning them, which have either chiefly 
obtained, or,he thinks are the mod confiderable,?//*. That 
of the Ancients, who deduce them from Humours putri- 
fying in primis viis ; of Sylvius* who places his Miner a 
in the Pancreas ; of Dr. Willis in the Mafs of Blood ^ 
of Dr. Jones in the Halit of the Body : Of his Diflcnt 
from each of which he alledges foree Reafbns ; though in 
the general, (agreeably to three of them) »that a Ferment 
to be fomewhere reconded out of the Road of the circu- 
lating Blood, and there gradually maturated, is neceiTary 
to. produce an interpolate Dilie/nper, 
