306 Succinct Review of the Observations of [No. 112, 



At new moon the mean time of high water was about 



a. m. Oh. 34m. 

 p. m. 46. 

 At full moon a. m. 06. 

 p. m. 38. 

 Average of time 0. 30. or 33m. 



The month of December makes an exception to this, and might en- 

 courage the supposition of another mean number during the West 

 monsoon, unless the observations made in that month exhibited a want 

 of accuracy, on account of which they are not be relied on. 



At new moon here also, as well as at Filitjap and Pulo Chinco, the 

 flood tide appears to come in always later than at full moon ; the mean 

 rise and fall was about ... ... 1. 14. ebb. 



The greatest ditto ditto 2. 50. ebb. 



The smallest rise observed at several places was scarcely perceptible. 

 A small rise was alternately taking place with a great one, and the 

 same occurred with the fall. The difference of the succeeding rises 

 and falls is here likewise deserving notice. The greatest difference 

 between high and low water took place in April and July. 



The highest water mark was in April, November, and December. 

 These remarks are made on observations taken during the period from 

 April to December, and especially during the East monsoon. 



At Klampsis, on the Northern coast of Madura. 

 It appears from the observations that were made, that there was no 

 flood or ebb stream perceptible during the East monsoon, and in the 

 month of May the stream had always during the day a Westerly direc- 

 tion, with the velocity from two miles to two and a half ; while at night 

 little or no stream was observed ; it sometimes likewise ran to the East. 

 The month of July forming the only exception to this, when in the night 

 also the stream ran to the West, with a force of about two to three miles. 

 In this monsoon the water is generally falling during the day and the 

 stream then strongest, while during the night the water is generally 

 rising ; the stream however has little force. 



These facts suggest the inference, that if ebb and flood tide here ac- 

 tually exist, the ebb tide has a Westerly direction, while the flood runs 



