RIGIDITY OF THE EARTH 115 



0123456789 10 II 12 



Fig. 13. — Mean of all observations, semi-diurnal Lunar tide. Dotted curve, 

 observed values; full curve, 0.7 of calculated. 



01234567 



9 10 II 12 





Fig. 14. — Mean of all observations, semi-diurnal Lunar tide. Dotted curve, 

 observed values; full curve, 0.5 of calculated. 



