20 



FLUCTUATIONS OP LEVEL 



quarter, increased to a gale, raising a lieavy swell niton the ]>ake. 'Die oscillations 

 were visible early in the morning, and continued with unusual Ki])idity all day. It 

 was not until late in the afternoon that a barometer could be procured. 



The readings were made at the moment of the culmination, and also at the 

 lowest ebb of the wave or oscillatory movement. The results agree in general with 

 those of Professor Mather, and show a steady motion of the barometrical column 

 in one direction during the fluctuations of the water level. 



REdisTER OF Barometrical Readings taken at the moment of the Ebb and Flood. 

 Eagle River, Lake Superior, October, 1856. 



