(no) 
know, whether an Object glafs be good or not, onely by 
looking upon it, without trying. This would be of good 
ufe , efpecially if it fhould extend fo far as to difcerne 
the goodnefs of fuch a glafs, whilft it is yet on the Ce* 
ment. 
An Account 
0fDr. Sydenham’s Book . , entituled ' Methodus Curandi 
Fcbres^ Propriis obfervationibus fuperftrufta. 
This BooJ^ undertakes to deliver a more certain and more 
genuine Method of curing Feavers and Agues, than has 
obtained hitherto : And it being premifed, Firjl, that a Fe- 
ver is Natures Engine,{he brings into the field, to remove 
her enemy ; or her handmaid;, either for evacuating the im- 
purities of the blood, or for reducing it into a New State : 
Secondly, that 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 .* 
This, I fay, being premifed by the Author, he informs the 
Reader s 
In the Firjl Se&ion, of the different Method, to be em- 
ployed in the cure of Feavers, not only in refpecSt of the dif- 
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 for- 
mer, he {hews, in what forts of Patients^ and at what time 
of the Feaver, Phlebotomy, or Vomiting, or both,are to be 
ufed $ and when and where not : In what fpace of time the 
Depuration if nature be not difturbed or hundred in her work, 
will be perform’d : When Purgatives are to be adminiftred : 
Ho w, that Diarrhea's happe n, if the Patient had in the begin- 
ning 
