Harmonic Analysis of Tidal Observations. 19 



TAKAW. 



Long. 120° 16' E. Lat. 22° 37' N. 



This is one of the permanent observatories in the island of 

 Formosa, belonging to the Land Survey Department of the Army, 

 and the site was chosen at the northern side of the bay and at the 

 mouth of it, as indicated in the accompanying map. The first 

 registration of the height of the water was made on the first 

 of November, 1903, and since then continuous observations have 

 been carried on without serious trouble. 



The instrument is Thomson's self -registering tide-gauge and 

 the scale is nearly one-twentieth. 



At present, only the reductions for the two years, 1904 and 

 1905 are completed. 



The highest high-water recorded in these two years was 2.61, 

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



m 



July 17, 1904. The lowest low-water recorded was 4,04, referred 



to the same origin and occurred on December 26, 1905. Thus^the 

 extreme range is 1.43 metres. 



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

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



m 



1904 3.382 



1905 3.424 



