574 



SCIENTIFIC RESULTS OF ZIEGLER POLAR EXPEDITION 



REDUCTION OF TIDES 



The above hourly heights of the sea were discussed by the harmonic analysis, the process 

 being essentially similar to that outlined by Prof. George H. Darwin, in the report of the 

 British Association for the Advancement of Science, for the year 1883, and hence not neces- 

 sary to reproduce here. The amplitudes {H) or semi-ranges of the components expressed in 

 feet, and their epochs (k) or component-tidal intervals expressed in degrees, as given in the 

 table, have been corrected by a process for eliminating the small residual effect of one compo- 

 nent upon another. 



Harmonic Constants 



Cape Flora. — Results from 104 J^ days, May 21, oh to September 2, iih, 1904, mean local 

 civil time. 



Symbol 



Ao 



U 



M, 

 Me 

 N, 

 Oi 



s, 



Name of component 



Mean sea level on tide staff No. i 



IiUiii-solar diurnal 



Ivuni-solar semidiurnal 



Smaller lunar elliptic semidiurnal 



Principal lunar series 



Principal lunar series 



Principal lunar series 



Larger lunar elliptic semidiurnal. 



Lunar diurnal. 



Solar diurnal 



Principal solar semidiurnal 



Variational 



Larger lunar evectional 



