THE RIGIDITY OF THE EARTH 



597 



10 



10 



Fig. 4. — N-S semi-diurnal lunar tide for entire year. Dotted curve from 

 observed values 



y = 6.fj2) sin (0-|-i48°24') 



Full curve from o . 7 calculated values 



3'= 6. 401 sin ((9-l-i47°32') 

 i? = o. 7 0/6 = 0.675. A(^ = 52' 



10 



Fig. 5. — E-W semi-diurnal lunar tide for entire year. Dotted curve from 

 obser\' ed values 



^ = 9.380 sin ((/)-l-63°56') 



Full curve from o. 7 of calculated values 



>' = 9.48ssin (^+58°io') 

 R = o.'] c/d = o.6g2. A<^ = 5°46' 



