82 APPLICATION OF THE PRECEDING RESULTS, &C. 



equal to a unit in the 27th decimal place. We thus see with 

 what rapidity f decreases, and consequently, the body approaches 

 to a permanent state, defined by the equation 



Hence, the polarity induced by the rotation is ultimately directed 

 along a line, making an angle equal to \TT + 7 with the axis X ', 

 which agrees with what was shown in the former part of this 

 article. 



The value of V at the body's surface being thus known at 

 any instant whatever, that of the potential function at a point p 

 exterior to the body, together with the forces acting there, will 

 be immediately determined as before. 



