Mac Fartane—Seiches in Lake Derravaragh, Co. Westmeath. 293 
observations of seiches; if they came in due course, as in the case 
of an eclipse of a heavenly body, there would be no difficulty in 
obtaining observers for a number of stations on a lake, in which 
case some result, as to the effect of the surroundings of the dif- 
nockross 
\249 
@ Streamstown Ho. 
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Laké Ho.atyes 65\ 
4253 
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ton 
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& Faughalstown 
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Mornin: 
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donore Ho. 
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Scale of Irish miles. 
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Scale of English Statute miles. 
LAKE DERRAVARAGH. 
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R,Inny t 
ferent stations might be arrived at; but when a seiche may occur 
at any time it renders it almost impossible to obtain synchronous 
observations except at considerable expense. Lake-dwellers might 
be roused to take an interest in the subject, but, even then, 
