the Ring of Saturn. 11 
^x-feet Newtonian reflector, which was certainty a very ex- 
cellent instrument, agrees perfectly well with mine. 
From what has been said, it does not appear to me that there 
is a sufficient ground for admitting the ring of Saturn to be of 
a very changeable nature, and I guess that its phsenomena will 
hereafter be so fully explained, as to reconcile all observations. 
In the mean while, we must withhold a final judgment of its 
construction, till we can have more observations. Its division, 
however, into two very unequal parts, can admit of no doubt ; 
and the following are measures taken of the diameter of the 
largest or outward ring. 
Oct. 7, 1791. Correction of the 20-feet clock — 2' 16", 5. 
Measures of the ring of Saturn with the 20-feet reflector. 
o h 37' 1st measure 54", 113 
2d 52 ,537 
3 d 52 ,8 75 
4 th 54 > 6 79 
5th 32 ,903 
6th 53 ,044 
7th 53 ,411 
S3", 366 mean of the seven measures. 
Proper allowance was made for the wires being tangents to 
the outside of the ring. 
When this measure is -reduced to what it would be at the 
mean distance of Saturn from the earth, we have 46", 832. 
Oct. 24, 1791. Correction of the 4 o-feet clock -J- 25", 4. 
Measure of the ring of Saturn with the 40-feet reflector. 
Power 370. 
