Harmonie Analysis of Tidal Observations. 59 



HANASAKI. 



Long. 145° 35' E., Lat. 43° 17' N. 



This is one of the permanent observatories belonging to the 

 Land Survey Department on the coast of Hokkaido, and faces the 

 Pacific Ocean. The first registration of the tidal states took place 

 on the first of November in the year 1895. The accompanying 

 map shows the position of the observatory with reference to its 

 surroundings. 



The series to which the harmonic analysis has been applied 

 and the reduction is already completed, are the five series of the 

 year 1899, 1900, 1901, 1902 and 1897. 



The highest high-water recorded in these years was 2.48, 

 referred to the zero-point of the instrument, and occurred on 

 December 26, 1901. The lowest low-water recorded was 4.82, 

 referred to the same origin, and occurred on November 17, 1902. 

 Thus, the extreme range is 2.34 in metres. 



The height of the mean sea-level, referred to the zero-point 

 of the instrument, is obtained as follows for each year-series: — 



7)1 



1897 3.696 



1899 3.705 



1900 3.659 



1901 3.666 



1902 3.665 



