TME 



iiil^UJK, tec. 



Art. L — Remarks on the supposed tides, and periodical rise and 

 fall of the JVortk American Lakes; by Major Henry Whiting, 



U. S. Army. 



In the article "'on the supposed tides in the great North Ameri- 

 can Lakes," coram unicated by Gen. H. A. S. Dearborn, (Vol. xvi. 

 No. 1, April 1829,) it is stated that Gov. Cass had been requested 

 to cause observations to be made, during his stay at Green Bay, on 

 the changes of elevation in the waters at that place. In the year 

 1828, while there on public duties, he did so, during a course of 

 more tha,n six weeks. The following table is the result, presenting 

 a series of observations of such extent and minuteness, as to deter- 

 mine as satisfactorily, perhaps, as the case admits, the character of 

 the phenomenon in question. A cask, without heads, was fixed in 

 the Fox river, just within its mouth, with a rod, graduated with inch- 

 es, placed perpendicularly in the center. The cask was perforated 

 so as to admit the water freely, while the rod, at the same time, was 

 protected from such fluctuations of the surface as the wind might 

 cause. 



Table of observations on the rise and fall of the Lake at Green Bay^ 

 ■ made by Gov. Cass in 1828. 



Vol. XX.— No. 2. 



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