28 Art. 7.— S. Hirayama. 



HOSOJÎMA. 



Long. ISr 40' E., Lat. 32° 25' N. 



This is one of the permanent observatories belonging to the 

 Land Survey Department of the Army. As will be seen from the 

 accompanying map, it is situated on the coast of the island of 

 Kyushu, facing the Pacific Ocean. More exactly, the observatory 

 is located at the eastern end of the town bearing the same name in 

 a small inlet — Hosojima-Wan. The first registration being made 

 on June 7, 1892, continuous work has gone on without any serious 

 interruption since then. 



The series of marigrams obtained in the years 1895, 1906, 

 1897, and 1906 were harmonically reduced and completed. 



The highest high-water recorded here was 2.72, referred to 

 the zero-point of the instrument, and occurred on August 24, 1895. 

 The lowest low water recorded was 5.51, referred to the same 

 origin, and occurred on January 13 of the same year. Thus the 

 extreme range of the tides is 2.79 metres. 



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

 of the instrument, was derived as follows: — 



1895 4.194 



1896 4.192 



1897 4.116 



1906 4.138 



