298 



DE. CHAELES CHEEE: SOME PHENOMENA OF 



TABLE XIV. Ratios Borne by the Amplitudes of the 12-, 8-, and 6-hour Fourier 



Waves to that of the 24-hour Wave. 



22. Talile XV. supplies the means of comparing the Fourier "wave" phase angles 

 derived from all the disturbed days with the corresponding angles for quiet days. 

 The quantity tabulated is the algebraic excess of the disturbed over the quiet day 

 phase angle. An increase of phase angle signifies an earlier occurrence in the maxima 

 and minima of the corresponding wave, an hour's advance in time answering to 15 

 in <x. 1 , 30 in 2 , 45 in a 3 , and GO in a 4 . Results are given for the three seasonal 

 diurnal inequalities as well as for the mean diurnal inequality for the year. Large 



TABLE XV. Algebraic Excess of Disturbed Days' Phase Angle over Quiet 



Days' Phase Angle. 



