THE HANGCHOW BOUE 



2 39 



by the report of Captain Moore, R.X., 4 who in 1888, in command of 

 H. B. M. ship Rambler and two auxiliary craft, undertook a thorough 

 survey of the river and estuary, which In- continued in 1892, and whose 

 \<-sels narrowly escaped total wreck. 



The Birth of the Boke as shown by Observed Water Levels 



In this survey observations of water-level were taken simultaneously 



at three places: Volcano Island, away out at the mouth of Hangchow 



Aspect of the River at the Same Place as the L>st Picture, and Only Two Minutes 

 Later. Wave Ten Feet High in the Center. 



Bay; Rambler Island, fifty-one miles farther in; and Haining, twenty- 

 six miles up the river. These measurements exhibit the nature of the 

 bore very clearly. At 8 :30 p.m. the water was one foot below mean 

 level at Volcano Island, twelve feet below at Rambler Island and 

 eight feet below at Haining. Thus the water sloped down from Hain- 

 ing outward to Rambler, and also downward from Volcano inward 

 to Rambler; the water was running up the estuary toward Rambler 

 Island, and down the river to the same point. By 9 :30 there was no 

 great change, but the water had risen two or three feet at Volcano 

 Island and at Rambler Island. By 10 o'clock the level was rising 

 rapidly at Rambler, so that there was a nearly uniform downward slope 



4 " Report on the Bore of the Tsien-Tang-Kiang," London, 18S8. " Further 

 Eeport," etc., 1803. Also, in Proceedings of the China Branch of the Royal 

 Asiatic Society, 1888. 



