130 



ANNUAL VARIATION. 

 TABLE XLIV. Annual Variation. FOURIER Coefficients. 



37. Table XLV shows approximately the dates when the 12-month and 6-month waves attain 

 a maximum. The 12-month wave has of course only one maximum in the course of a year, separated by 

 six months from the minimum. The 6-month wave has two maxima, 6 months apart, with minima 

 equidistant between them. The date recorded for this wave in Table XLV refers to that one of the two 

 maxima which falls nearest to January 1. 



TABLE XLV. Annual Variation. Dates of Maximum. 



