92 On the supposed Tides in the 



ered with water ; — again it would be level, and no water 

 apparent. 



By a reference to some of my notes, it will be seen that 

 the waters often swelled against the wind. This fact would 

 seem to militate against any theory, assigning the rising to 

 the winds, if it were not known that the outlet of Fox river 

 is very serpentine, forming two or three deep curves in the 

 course of a less number of miles. Hence the wave, heaped 

 up by winds prevailing up the Bay, would be likely still to 

 continue to roll into the river, sometime after the impulse 

 had ceased, and even after the wind had changed. 

 » Existing facts do not establish either the negative or affirm- 

 ative ; though I think it pretty clear, that the Green Bay 

 tides, or whatever they may be called, are independent of 

 all celestial influence ; for no one pretends that they ever 

 appeared to acknowledge any fealty to the planets. 



It is rather the settled opinion here, among those, who 

 have reflected much on the subject, that whatever changes 

 in the level of the water take place, must be referred to the 

 winds. That there has been a doubt in the case of Green 

 Bay, is probably owing to the singular configuration of that 

 deep inlet, and the sinuous outlet of the Fox river, when the 

 effect is often so tardy, in following the cause, and sometimes, 

 even running counter to it, as to sever all apparent connex- 

 ion between them. 



Note. — Capt. Whiting having informed me in a letter of 

 the 16th of April, 1827, that Gov. Cass would hold a treaty, 

 at Green Bay, during the summer, I had requested him, to 

 desire the Governor, to make experiments, and to be so kind, 

 as to communicate to me, the results, which, with his usual 

 liberality, he was so generous as to say he would do ; but un- 

 fortunately, his higher official duties prevented. H. A. S. D. 



Letter from Capt. Greenleaf Deqrborn, of the U. S. Army, 



Monmouth, Maine, March 5, 1827. 



My dear Sir — By the last mail, I received your favor of 

 the 26th ult. and hasten to answer it, as far as my knowl- 

 edge extends. 



About the 15th of May, 1825, while stationed at the 

 Sault de St. Marie, at the outlet of Lake Superior, I obser- 

 ved, for three successive days, a regular ebb and flow of the 



