90 On the supposed Tides in the 



der to ascertain its regularity and succession. The result of 

 these observations, which were necessarily brief, and defec- 

 tive, is annexed ; very little satisfactory inference can be 

 drawn from them, as no correspondent observations were 

 made upon the courses of the moon, without which no cer- 

 tain deductions can be made, as to the agency of that plan- 

 et in producing this change. It will be observed, however, 

 that during three of the six days, in which the observations 

 were made, there was a flux and reflux, twice, notwithstan- 

 ding the wind prevailed, in the same course, during the day, 

 which affords something like a proof, that it is not the wind, 

 alone, which produces them. The height of the rise and 

 fall, was from twelve to eighteen inches. Both the ebb and 

 flow were very sudden, and in that respect deviate from the 

 general character of tides. It was seldom more than an 

 hour, in attaining its height, and was generally as rapid in 

 making the descent, though several hours would often inter- 

 vene between the changes. 



Supposing the winter to be the most favorable time for 

 making certain observations, when the superincumbent ice 

 would nearly destroy the influence of the winds, and shew 

 the unassisted operations of the tide ; I made inquiries, as to 

 the appearance of it, during that season. One gentleman 

 informed me that no tide was then discernible. Another, 

 equally intelligent, told me that it was very apparent, and 

 that there was a regular elevation and depression of the 

 ice. This difference of accounts, may, perhaps, be recon- 

 ciled, by the probable difference in the closeness of the ob- 

 servation. 



Tide at Green Bay. 



1819. June 1. 4 o^clock P. M. High tide. 

 " " 10, " P. M. Low tide. 



6, " P. M. High tide, I 



3. No visible change in the height of the wa- 

 ter ; winds variable, and often high. 



4. 11 o'clock A. M. Low tide; wind west. 

 Continues low ; wind 



strong, south west. 

 High tide ; calm. 



5. 7, " A. M. High tide, ' 



2, 5, " A. M. Hi£[h tide, r • . 

 ' ' t^ ' I wma west. 



High tide, ) • . 

 Lot tide, 5 ^•"^' ^- ^' 



