296 



DK. CHAKLES CHREE: SOME PHENOMENA OF 



inequalities derived from the 10 days a month of largest absolute range and from the 

 days of the four sunspot maximum years. Of these the c and a constants are given in 

 Table XIII. , alongside the constants derived from all the disturbed days. Arithmetic 



TABLE XIII. Fourier Coefficients, Amplitudes, and Phase Angles. 



mean values from the 12 months, for all disturbed days, are also given for the c 

 constants, as some authorities prefer them to the values derived from the mean 

 diurnal inequality for the year. Unless the phase angle is invariable throughout the 

 year a most unlikely contingency, even if solar time were used the arithmetic mean 

 value necessarily exceeds that derived from the mean diurnal inequality. In cases 



