BETWEEN SUN-SPOT FREQUENCY AND TERRESTRIAL MAGNETISM. 187 



absolute daily maximum and minimum at Zi-ka-wei. The units are 1' for angles, 

 ly for force components. 



At Irkutsk the values of b for D and H are similar to those at Katharineuburg ; 

 the values of b/a for these elements are similar to those at Kew ; in V the values of 

 b and b/a, are decidedly less than at Katharinenburg. 



At Zi-ka-wei bja is decidedly less, and b much less, than the corresponding values 

 for Katharinenburg (second line of Table XIV.). 



At Colaba the ("quiet" day) values of b and b/a for I) are notably less than the 

 corresponding (" all " day) values at Mauritius, the smallest occurring in the paper ; but 

 the value of b for H exceeds that at Batavia, the largest previously noted. The 

 value of b/a for V is conspicuously small.] 



2 B 2 



