18 Art. 7.— S. Hirayama. 



In the tables following the notes, the amplitude and the phase 

 constant of each component of tides are given for each year-series. 

 So far the values of the amplitude and the mean sea-level are 

 measured by the assumed scale, for the series of the observations 

 made by the Land Survey Department. But the material pro- 

 vided by the temporary ofißces for constructing the harbours at 

 Yokohama and Kobe has been converted into the metric system. 



Finally specimens of the marigrams at high and low water 

 are appended ; these are four in number, the first two showing the 

 highest high and lowest low water, and the latter two the tides of 

 the largest and smallest range. 



In pp 62-67, we gave the mean values of the amplitude and 

 the phase constant for each station, and here the former is reduced 

 to the working scale. In these tables, the second row shows the 

 number of years on which the mean values rest. 



