[ 4+i ] 
Remark. 
4 6. It fhould be oblerved, that, to Shorten the 
computations, I have contented myfelf with taking 
the times of the revolutions pretty near the truth ; 
but if the utmofl exadtnefs be required, the accurate 
times of the revolutions mud be employed. 
47. This might be a proper place to add the me- 
thod of determining the perturbation of the orbit of 
any planet, as derived from another planet j but 
fince this depends upon no other than the very fame 
principles that have been made ufe of in this me- 
moir, and as their application will be fhewn, in its full 
extent, in the memoir which I am going to print, and 
intend myfelf the honour of fending to the Royal So- 
ciety, I flial l defift, that I may not run this paper to a 
greater length. 
LIX. A Letter to the Right Honourable 
George Lari of Macclesfield, P. R. S. 
concerning the ages of Homer and Hefiod . 
By George Coftard, M. A 
My Lord , 
Read Dec. 13, "V'T feems to be an opinion pretty gene- 
*75 3- r ally received, that Homer and He- 
fiod lived much about the fame time. If this be 
true, and they did fo, whatever arguments prove the 
age of one, will equally ferve for fixing that of the 
other. What that age was, is indeed not at all agreed 
on among writers ■> the only thing in which they con- 
Kkk fpire 
