64 



MOMENT OP INERTIA OP MAGNET A. 61. 



The moment of inertia of the magnet (with appendages) K becomes for the 

 temp. 69 (and corrected for torsion) 



K= K, r 2 = 2.220 and lg K= 0.34631. 



Using 0.0000068 for the coefficient of dilatation for 1 Fahr., the above lg K for 

 different temperatures becomes : 



For 62, lg K= 0.34628 and lgn*K= 1.34058 

 " 32, " 0.34609 = 1.34039 (CnAS. A. S.) 



