Dr . Hekschel’s Obfervations 
By this it appears that Saturn is confiderably flattened at 
the poles. And as the greateft meafures were taken id the lme 
of the ring and of the belts, we are allured that the axis o 
the planet is perpendicular to the plane of the ring; and 
that the equatorial diameter is to the polar one nearly as 1 1 
t0 \Ve may alfo infer the real diameter of Saturn from thefe 
meafures, which are perhaps more to be depended upon than 
any that have hitherto been given. But as m my journal I 
have meafures that were repeatedly taken thefe ten years pall, 
not only of the diameter of Saturn, but of tire ring, and its 
opening, whereby its inclination may be known ; a. well at of 
X diftance of the fourth, and fifth, and other fatellites, 
which will be of great ufe in afeertaining the quantity of mat- 
ter contained in the planet, 1 referve a full mveftigauon o 
thefe things for another opportunity; hnce, from the date o 
this Paper, it will be fufficiently evident, that there can be no 
time for me to enter properly into the tubject. 
One beautiful obfervation of thetranfitof the fhadow of the 
fourth fatellite over the dilk of Saturn, 1 muft add, to con- 
clude this Paper. . . 
Laft night, November 2, 1789, at 23 h. 13 fu.ereal turn, 
being always in queft of any appearance that may a or t re 
means of afeertaining the rotation of Saturn on an axis, I 
difeovered a black fpot on the following margin of the dilk 
of that planet. 
At 22 h. 21', I perceived a protuberance on the louth pre- 
ceding edge of the dilk, which I fuppofed to be the fourtu 
fatellite going to emerge. 
At 
I 
