( 2o8 ) 
Nor is it likely, -that in the Year 170^.: when headded the- 
aforefaid Scholium to the End of the Book of Quadratures,, 
he had forgotten not only the firfl Propofition of that Book, 
butalfo the laft Propofition upon which that Scholium was 
written. If the Word [ \ut\ which int hat Scholium may have 
been accidentally omitted between the W ords [erit] and [ejus,] 
be reftor’d, that Scholium will agree with the two Proportions 
and with thereftofhisWntings.and theObjedion willvanifh* 
Thus much concerning the Nature and Hiftory of thefe 
Methods* it will not be amifs to makefome Qbfervations 
thereupon* • 
In th Q.ComMereium Epljl'olicttrn, mention is made of three 
Trads written by Mr. Leibnitz, afrer a Copy of Mr. Newton's 
Trine if ia. Philo fofhi£ had been fent to HannovtY for him, and 
after he had feen an Account of that Book publilhed in the 
API a Bruditorum for fanuary and February 1689. And in 
thbfe Trads the principal Proportions of that Book ar^ 
compofed in a new manner, and claimed by Mr. Leibnitz as 
if he had found them himfelf before the publishing of the- 
faid Book. But Mr. Lejbpliz cannot b .5 suAVitnels in his . 
owti Caule; It lies upon him either to prove that he found 
them before Mr. Newton, or to quit his claim. 
In the laft of thofe three Trads, the xeth Propofition 
(which is the chief of Mti Newtons Proportions) is made a; 
Corollary of the 19^ Proportion, and the 19/^ Propofition 
lias an erroneous Demonftratibn adapted to it. It lies upon < 
him either to fatisfy the World that the Demonftration is not 
erroneous, or to acknowledge that had id not ftnd that and 
the xoth Proportion thereby, but tried to adapt a Demon-? 
Oration to Mr. Newtons Proportion to make it his own. For 
he reprefents in his 10/^ Propofition that he knew not how 
Mr. Newton came by it, and by confequence that he found 
it himfelf without the AfTiftknce of Mr. Newton. 
By the Errors in the 15 th and 19th Propofition of the third 
Txkb x PtACcill hath fhewed that when Mr .Leibnitz wrore 
thefe. 
