confent in what has been juft now dexlared 9 & the jdfmtrover- 
fie being ab^ut Matter of wherein Au <ho rity , N umber, and 
Reputation mult caft the Baliance, Monk Hevelius , who is as 
well known for his Ingenuity') as Reaming , wifi jbya and ac- 
quiefce in that fentiment. 
Of a Correffondency f:o he procured for the Fin- 
ding out the True diftance of the Sun and 
Moon from the Earth Joy the Parak xybfer- 
ved under (or nee r) the fame Meridian. 
Seeing that the kno wledge of this diftance may prove of im- 
portant Ufe, for the Perfecting of Aftronomy, and for the 
better eftabhfhing the doctrine of J{cfr%B$pns ; it is in the 
thoughts of iome very curious Perfons in tngland, for the 
finding out the fame , to fettle a Correspondency with fome 
others abroad, that are nnderftanding in Aftronomical mat- 
ters, and live in places farr diftant in Latitude 3 and under ( or 
near ) the fame Meridian. 
To perform which, the following Method is propofed to 
be obferved^ vi%, That at certain times agreed on by two 
Obfervatours, making ufe of Telefcopes, large, good and well 
fitted for this purpofe, by a meafuring rod^ placed within 
the Eye- glafs at a convenient diftance., that it may be dfifind-. 
Iy feen, and ferve for meafuring final 1 diftanees by minuts 
and feconds ( which is eafie enough in large Tele [copes ) that, 
1 fay, each of fuch obfervcrs 3 thus furnifli'c, fliall obferve the 
vifible way of the Moon among the Fixtffars, (by taking her 
exad diftance from any Fixt fiarr, that lyes in or very near 
her way, together with the exad time of her io appearing) 
and the then apparent Diameter of her Disk 5 continuing 
thefe Obfervations every time for two or three hours, that fo. 
