( 1 88 ) 
told us that this was in the Year 1 675- However, it lies up- 
on him to prove that he had this Series before he received it 
from Mr. Oldenburgh. For in his Anfwer to Mr .Oldenburgh he 
did not know any of the Scries then fent him to be his own; 
and concealed from the Gentlemen at Paris his having recei- 
ved it from Mr. Oldenburgh with feveral other Series, and his 
having feen a Copy of the Letter in which Mr. Gregory had 
fent it to Mr. Collins in the Beginning of the Y ear 1671. 
In the fame Letter of Augujt 27. 1676, after Mr. Leibnitz, 
had deferibed his Quadrature of the Circle and Equilateral 
Hyperbola, he added : ticijfim ex feriebus regreffuum pro Efy- 
ferbola hanc invent. Si fit numerus aliquis unitate minor | — m, 
ejufque logarithms Hyperbolicus 1. Erit m = ~ — ~ 
— » 1 xzx; X4 ~f~ & c - Si numerus fit major unitate* ut 1 -j-n, tunc 
fro eo inveniendo rn’ihi etiam prodiit Regula qua in Newtoni Epi- 
Jlola expreffa eft : fei licet erit n === t + 7T, ■ + 77777 + , 7 
+ &c, - ■■ ■•» fluod regreffum ex arcubus attinet , incider am ego 
dirette in Regulam qu<e ex dato arcu finum complementi exhibet. 
Mempe finus complementi — 1 — -f- , x , * , 77 — &c. Sed po - 
(tea quo q ne deprehendi ex e/t Warn nobis commit* teat am pro inveni- 
endo finu { recfc t qui eft r ^ 17777 + 7777^x777 - &c - ? 4 e fa 
monftrari. Thus bftt.Leibnit zyut in his Claim for the Co-inven- 
tion of thefe four Series, tho’ the Method of finding them 
was fent him at his own Requefl, and he did not yet under- 
hand it. For in this fame Letter of Augujl 27 1676. he defired 
Mr. Neveten to explain jt further. His Words are. Sed deft- 
deraverim ut ClariJJimus Newtonus nonnulla quoque amplius ex- 
flic et ; ut originem theorem at is quod initio ponit : Item modum 
quo quantitates p, q, r, inf is Operationibus invenit : Ac denique 
quomodo inMethodo regrefuum fegerat,ut cum ex Logarithmo qux- 
rit Mum 0 rum. Meque enim exp l* fat quomodo id ex methodo (ua de- 
rivetur. He pretended to have found twpSeriesfor theNuqiber 
whofe Logarithm was given, and yet in the fame Letter de r 
