184 h] the Tides in the Indian Archipelago. 305 



At new moon at. 9h. 18m. p. m. 

 and at 8 53 a. m. 

 At full moon at 8 45 p. m. 

 and at 8 19 a. m. 

 Average of the time 8 48 



and therefore as the time of flood tide is noticed to the moment when 

 the water again commences to decrease, we may fix here, as mean 

 number, 8h. 30m., considering that here also the period of the flood 

 tide during the fortnight passed the space of 12h. 



At this station was observed the same remarkable fact as at Pulo 

 Chinco, that at new moon it was high water an hour later than at 

 full moon. 



The mean rise and fall of the water was 1 . 25 ebb. 



the greatest 2. 42 

 the smallest 0. 10. 



The greatest difference in the rise and fall of the tide took place some 

 days after the new and full moon, not however exceeding 2.63 ebb. 

 The highest water mark was observed in the East monsoon. 



The difference of the rise and fall of the succeeding tides is here 

 very notable, and appears more than elsewhere to be in connection with 

 the decrease of the moon. The morning and evening tides are different, 

 especially at the decrease of the moon, while they were about equal at 

 the time of the moon's passing the Equator. 



At Amboyna. 



Although the streams in the bay are not strong, and sometimes only 

 run from two miles to two and a half, and the turns of the tide very 

 irregularly take place, we may state that the stream of the flood tide in 

 the East monsoon runs into the bay along the northern coast to the E. 

 and runs out along the southern coast to the S. W. The opposite 

 course takes place in the West monsoon, while in the middle of the 

 bay little or no stream is observed. 



The duration of the rise and fall of the water is here very regular, 

 about six hours and a quarter, so that the flood occurs about twice a 

 day, and in a fortnight looses about twelve hours. 



