TABLE 737 (continued) rgr 



MEAN ANNUAL VALUES OF MAGNETIC ELEMENTS AT OBSERVATORIES 



'Superseded by Tucson. October, 1909. "Means, 10 months. January to October. 'Means, 6 months 

 July to December. u Destroyed by earthquake, September 1, 1923; all records, January, 1917 to August, 1923. 

 lost bv fire. 



Smithsonian Tables 



