Table 737 {continued) 587 



MEAN ANNUAL VALUES OF MAGNETIC ELEMENTS AT OBSERVATORIES 



cc 1913, change of earth inductors; the values with the inductor used previously appear to be 3'.o too high. 

 dd Discontinued 1923. ee New constants determined in 1914. used thereafter, gave for that year smaller values 

 in H by 187 and in Z by 77 than those based on the constants previously used. " Means. 9 months. January 

 to September. e« Superseded by Alibag in 1906. hh In igogan earth inductor replaced the Kew dip : circle; 

 observations of I 900-1 1 appear to show that the old values of / are about 2' and of Z about 307 too low. ■ ' New 

 1923 constants make a change of —217 and —107, respectively, necessary for values of // and Z given from 

 1904-22. ii Superseding Vieques Observatory. kk Five months means, January to May. "Discontinued 

 October 31, 1924; values for 1903, means for 9 months, April to December and those for 1924. 10 months, 

 January to October. ™ ra Superseded by Antipolo because of electric car disturbances. nu 1914. new constants, 

 thereafter used, gave for that year larger values in // by 337 and in Z by 37- 



Smithsonian Tables 



