46 



M components 



It is for the preparation of such tables for 369 or more days that 

 the speeds of the components are extended to seven places of decimals. 



The application of these tables is illustrated in the extension of the 

 subjoined tabulation to include the seventh day. 



Mean 

 solar 

 hour 



(0)-_... 

 (0.966) - 

 (1.932). 

 (2.898) _ 

 (3.864). 

 (4.831). 

 (5.797). 

 (6.763). 

 (7.729) . 

 (8.693) . 

 (9.661). 



11 (10.627). 



Mean 

 solar 

 hour 



Mean lunar 

 hour 



(11.593) 

 (12.559) 

 (13.525) 

 (14.491) 



Calendar days 



12 3 4 5 6 7 



Nearest whole lunar hour 



The height of the M group of components at zero component hour 

 is found by summing and averaging the observed heights at the hours 

 marked on the tabulation; the height at the first component hour 

 by averaging those marked 1, and so on for the 24 component hours. 



86. Example. — The hourly heights of the M components found from 

 the application of this process to the observed heights at Sitka, Alaska, 

 over a period of 29 days beginning July 1, 1893, are as follows: 



