482 



PROFESSOR CHRYSTAL 



At 20 h 18 m the wind was W.S.W. and variable. 



At 14" 7 m a microbaric disturbance passed Ardtrostan, travelling with a velocity of 

 15 (mile/hour) from W. 60° N. (36 along the lake). 



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Fig. 11. 



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One of the Lake Survey staff was looking at the uninodal limnograph, and saw it 

 record the sharp depression shown in fig. 11, just as the squall came up. For some 

 time before, the limnographs at the uninode, binode, and Picnic Point had been draw- 

 ing almost straight lines. The seiche weather had, in fact, been the calmest known in 

 our two months of observation. 



