IS 
Dr. Herschel's Observations on 
i h 3' ist measure 53", 9 14, 
2 d — 33 ,260 
S 3 " >587 mean of the two measures. 
Reduced to the mean distance of Saturn, the measure is 
47", 241. 
Nov. 21, 1791. Correction of the 4,0-feet clock — 7", 8. 
Another measure of the ring of Saturn with the 40-feet re- 
flector. Power 370. 
o h 48' 1st measure 50", 627 
2d 30 ,042 
3 d — - - 5 ° >808 
30 // ,492 mean of the three measures. 
Reduced to the mean distance of Saturn the measure is 
45">8o3. 
Oct. 24 47", 241 
Nov. 21 43 ,803 
46", 322 mean of the measures with 
the 40-feet reflector. 
40-feet 46 // ,522 
20-feet 46 ,832 
46", 677 mean of all the measures. 
By way of forming more easily a comparative idea of the 
stupendous size of this ring of Saturn, I have calculated the 
proportion it bears to the earth, and find that its diameter is 
to that of the latter as 23,8914 to 1 ; and that consequently. 
