GRAPHS ON "QUIET" DAYS DURING THE TWELVE YEARS 1891 TO 1902. 399 



Table XVI. gives the values of the angles for the mean diurnal inequalities of the 

 three seasons and the year when Falmouth solar time is used ; it corresponds to 

 Table XXVIII. of (A) for Kew. 



TABLE XVI. Seasonal Values of the Angles in Fourier Coefficient Expansions of 

 Diurnal Inequality (1891 to 1902) when Falmouth Solar Time used. 



Table XVII. gives the local solar times of the earliest maximum in the day for the 

 several terms. These times, as in (A), Table XXIX.,* are given only to decimals of an 

 hour, it being doubtful whether higher accuracy can be claimed for individual results, 

 especially in the terms of shortest period. In calculating, however, the differences 

 between the local times of occurrence at Falmouth and Kew, I employed the complete 



TABLE XVII. Times of Occurrence of First Maximum in the Terms of the First 

 Four Orders in Fourier Expressions for Diurnal Inequality for the Period 1891 

 to 1902 (Falmouth Local Time). 



angles in Table XVI. and the corresponding Table in (A), and, in converting the 

 differences into time, went to the nearest minute. These differences, in minutes, 

 appear in small type in Table XVII., the + sign denoting later occurrence at 

 Fulmouth. The approach to coincidence in the local times of occurrence of the 

 maxima at the two stations is truly remarkable. The algebraical mean of all the 



* The time 1 1 h. assigned to the Kew 24-hour H-term in winter is in error. It should be 0'5 h. 



