ON THE SEICHES OF LOCH EARN. 



489 



institute. But then it is not the way of Nature to flaunt her beauties before the 

 unappreciative, or to press the secret principles of her action upon the attention of 

 the unreflecting. 



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Fig. IS. 



Laboratory Experiments illustrating the Origin of Seiches. 



In a lecture # given at the Royal Institution the writer showed some experiments 

 with a miniature parabolic lake, to illustrate the nature and origin of seiches, which 

 seem worthy of mention here. The trough used was 12 feet long, about 2f inches 

 wide, and 12 inches deep. It was fitted with a parabolic wooden bottom, and filled 

 with slightly coloured water to a depth of about 7f inches. 



Following a method used by Messrs White and Watson in their interesting 

 experiments on this subject,t we found it possible, by stirring horizontally with a 

 small paddle at the theoretical positions of the nodes and with the corresponding 



* See Proc. Roy. Inst, Friday, May 17, 1907. 

 t Proc. R.S.K, vol. xxvi., p. 146 (1906). 



