810 



DR. S. rilU'MAN ON THE DIURNAL VARIATIONS OF THE 



while in view of the large accidental variations of the determined amplitudes. In 

 Tables XI.-XIII. the values of the mean phases tf have been characterized by 

 affixes 1, 2, 3, 4, 5, representing (in descending order of merit) the reliability of the 

 mean as judged from the accordance of the separate values of tf. Only the numbers 

 marked 1 to 3 can be considered at all satisfactory. 



As regards the accordance of the results from the same or different stations, the 

 best feature is the extremely good agreement between CHAMBERS' and Moos's values 

 for Bombay, for different periods of time and for different instruments.* 



* VAN BEMMEI.EN, in his paper in the 'Met. Zeitschr.,' May, 1912, already referred to, remarks that 

 the two computations do not agree at all, but this must evidently be due to a mistaken reduction of 

 CM AM units' results, which he quotes at three times their proper value. 



TABLE III. Trevandrum. Declination West. 



The unit of force in the tables of amplitude is 1Q-* C.G.S. 



unit. 



