314 Succinct Review of the Observations of [No. 112. 



The tides are very irregular ; there being only once in a day flood and 

 ebb tide, and sometimes of the duration from nine to fifteen hours. 



The period of the flood tide has here, as at Klampsis and Onrust, a 

 general though irregular retardation, viz. in the East monsoon, as at 

 Klampsis, the high water comes in before noon and in the morning ; in 

 September early in the morning ; in October, November, and December, 

 in the night ; during the West monsoon in the night and in the even- 

 ing ; in April in the afternoon ; while this period is most irregular during 

 the turning months. 



The mean rise and fall was, ... ... 1* 25 ebb. 



The greatest, 2-03 



The highest water mark is in April, and generally the 21st and 22nd 

 of the month. 



At Tapara. 



No ebb and flood stream properly speaking, and the whole course 

 of the tides very irregular. With the rising water, a stream was gene- 

 rally observed having an easterly direction ; high water only once 

 in the same day. Here also the period of the flood tide appears 

 to undergo a general, though indefinite annual retardation, viz. the flood 

 tides during the month of May and June take place after noon and 

 at noon ; the ebb-tide in the morning and about midnight. 



In July, August, and September, they take place successively earlier, 

 so that the high water comes in October about half- past five o'clock 

 in the morning ; in December about half-past one in the morning ; and 

 during the W. monsoon in the night and in the evening ; and consecu- 

 tively the flood-tides again occur in the afternoon. The period of ebb 

 and flood tides at new and full moon is very irregular. 



The mean rise and fall is, ... ... ... 1*31 ebb. 



The greatest, 2- 00 



The highest water-mark was observed in October. 



At Macassar. 



According to some observations of a later date transmitted to us, 

 viz. during the three first months of 1840, the tides are very irregular ; 

 having a close correspondence with the tides on the Javanese sea. 



