Clio) 
know, whether an Objeit glafs be good or not, onely by 
tooking upon it, without trying. 1 his would be of good 
ufe, efpecially if it flioukl extend fo far as to difcerne 
the goodncfs of fuch a glafs, whilft it is yet on the Ce* 
ment. 
An Account 
^/Dr .Sydenham's Book^ eniituted^ Mcthodus Curandi 
Fcbres^ Propriis obfervationibus fuperftrufta. 
This Soo^ undertakes to dehver a niore certain and more 
genuine Method of caring Feavers and Agues,, than has 
obtained hitherto : And it being premifed, firjlj that a Fe- 
ver is Natures Engine^fhc brings into the field, to renaove 
her enemy > or herhandmaidj either for evacuating the im- 
purities of the blood, or for reducing it «*ito aNcw State : 
SecQndlyyX\\2it the true and genuine cure of this ficknefs con- 
fifts in fuch a tempering of the Commotion of the 
Blood, that it may neither exceed, nor be .too languide: 
ThisJ fay^being premifed1)y the Author, he informs the 
Reader/ 
In xhQFirJl SeBioriy of the different Method, tobeenf-^ 
ployed in the cure of Feavers,not only in refpedl of the dif-r 
fering conftitutions and ages of the patients, but alfo in re- 
gard of the differing feafons of one and the fame year, and 
of the difference of one year from another. As to the f or*' 
mer, he (hews, in what forts of Patients^ and at what time 
of theFeaver, Phlebotomy,or Vomiting, or both^are to be 
afed • and when and where not : In what fpace of time the 
i:)£/?z^r<^/^^'of3 if nature be not difturbed or hindred in her work, 
will be performed : When Purgatives are to be adminiftred : 
£lowthjiiti?/^rr^^^ J happen, ifthe fatienthA^'m the begin- 
ning 
