4 Art. 7.— S. Hirayaina. 



according to the sea on the coast of which the observatory is placed, 

 we have the following summary: — 



The Pacific: Hanasaki, Ayukawa, Yokohama, Aburatsubo, 

 Kushimoto, and Hosojima. 



The Japan Sea: Otaru, Iwasaki, Wajima, and Tonoura. 



The Seto Inland Sea: Kobe. 



The Eastern Sea: Fukabori and Kiirun (Keelung). 



The China Sea: Takaw (Takow). 



These sites were selected by the Land Survey and other De- 

 partments after careful investigation, having regard to the follow- 

 ing points: ready communication with the sea, deep water at low 

 tides, shelter from storms, freedom from freshets, and non-pro- 

 ximity to the head of a bay or tidal river, in order to represent 

 well the states of the tides in a considerable area. For the two 

 temporary observatories, the selection of the sites was limited to 

 finding the part where the water is comparatively calmest in the 

 port. The distribution of these fourteen sites is indicated in the 

 accompanying map, Plate I, and the approximate geographical 

 co-ordinates of these observatories are given in the following table. 



Observatory Long. E. Lat. N. 



Takaw 120° 16' 22° 37' 



Kiirun 121 45 25 9 



Fukabori 129 49 32 41 



Hosojima 131 40 32 25 



Tonoura 132 4 34 55 



Kobe 135 11 34 41 



Kushimoto 135 4G 33 28 



Wajima 136 54 ,37 ,24 



Aburatsubo 139 37 35 10 



Yokohama 139 38 35 27 



