s8o 
Dr Herschel’s Observations, &c. 
the eye is capable. An exact copy of it is given in Plate IX, 
The dimensions of it in proportional parts are. 
The diameter of the greatest curvature - 36 
The equatorial diameter 35 
The polar diameter - - 32 
Latitude of the longest diameter - - 43 0 20'. 
The foregoing observations of the figure of the body of 
Saturn will lead to some intricate researches, by which the 
quantity of matter in the ring, and its solidity, may be in some 
measure ascertained. They also afford a new instance of the 
effect of gravitation on the figure of planets ; for in the case 
of Saturn, we shall have to consider the opposite influence of 
two centripetal and two centrifugal forces : the rotation of both 
the ring and planet having been ascertained in some of my 
former Papers. 
J - ' '--J' - • ' *■ ■ ■ : ' 
rii t-. ; - ■; it to r; ch 
c. 
V . f 
:-'C l: 
