( 369 > 
different in the pofition of the Libratory circle, to take notice of 
it in a letter to Mt.CcUms, from whom you received the informa- 
tion, and with my confenc printed the extraftof it : In which 
I defigned nothing but toaflert to the dead an Invention, which 
he efteemed thebeft he ever lighted upon, and which,queftionIefs, 
is the chief of his Monuments : This had I neglefted, I had been 
unjuft to thedead, whofe papers pailed through my bands to the 
Publick * nor have, I hope, been at all injurious to Mr. S^ree^ in 
it, as may appear by my Letter, if confidered by any unintereiTed 
perfon. 
For, my affertion concerning his figure of the Lunar Syftenie 
was, that the contrivance of it, forthe Motion of Longitude, \vas 
no other then what was taken from Mr. Horrcoc's Theory and my 
Explication^ whereby I conceive no man would underftand me of 
his Numbers , fince I never mentioned them, and he has publilh- 
ed none, but courfe Mean motions, .with a iittJe Table or two 
for finding the Latitude 5 but I took notice, that the form was the 
fame^ and the Excemricityvmed^-the Refie^iion or V mat ion alter- 
ed inthe fame proportion as in the Horroximlheory ; which that 
they are, 1 fuppofe he will not be fo difingenious to deny, fince it 
will be manifeftly evident to any that will be ar the pains to com- 
pare his print with the 1 16 and 117 Schemesy belonging to my 
Explication: After which I know not .what he has, that he 
may call his own,, or that can entitle him to this Sy- 
fteme. 
Perhaps he will fay, he has tramferM the hihratory Circle from 
ihtOrhis to the tranfverfe diameter of the Ellipfis. But 
this isnot material, fince the effeft is ftill the fame ; and fuppofing 
the fame diameter of the Libratory circle, the fame Equations 
will be found to a fecond ; So that hereby he only has gain'd a 
pretext to call the Syfteme his own, but he has rendred the Cafe of 
the Libration lefs intelligible- 
He adds,that he has emreasd the quantity of the great eft Librati- 
en 2zmm, fo that the femidiameter of the litde circle, that fhews 
the variation, may fubtend the greater iEquation of the Apogee, 
the mean excentricity being Radius. This indeed is an ingenious 
conceit; yet amounts it to no more, than an alteration; which 
whether the Heavens will admit of,we may juftly queftion. I find 
Gcc by 
