AND OTHER WATER WAVES 241 



rent above referred to the rise of level was 

 continuous. 



The second occasion on which I saw the bore 

 from Newnham was on October 29, 1901, after a 

 summer when the river had been low owing to 

 small rainfall, and at a time when the usual heavy 

 rains of autumn had not commenced. Although 

 the tide was almost the highest of the year, the 

 bore was a very small one. Stationing myself 

 first in the churchyard, I noticed that the bore, 

 which had been visible before entering the pool 

 near Bullo, disappeared there except for some dis- 

 turbance of reflection from the surface of the deep 

 water. I then ran down to the shore. On the 

 shelving sand-bank which formed the left shore 

 of the low-water channel the bore advanced as 

 a crested wave of no great size, rolling over upon 

 itself. As I watched this, my attention was caught 

 by the sudden submergence of a stake near me, 

 which I had noticed as being convenient for 

 marking if there were any change of level before 

 the arrival of the bore. I found, however, that 

 the quick rise of water which covered the stake 

 was the whole of the " bore " on this, the deeper, 

 side of the river. There was here no steep- 

 fronted wave. Moreover, after this rise, there was 

 a marked subsidence, so that the wave was not 



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