86 \ On'the supposed Tides in the 
rents of the atmosphere, to whose agency we may attribute, 
at least in. part, the appearances of a tide, which are more 
striking upon the shores of this, than of any of the other 
great lakes. The meteorological observations which have 
been made inthe Trans Alleghanian States, indicate. the 
winds to prevail, either north or south, through the valley of 
the Mississippi; but seldom across it, so that the surface of 
this lake, would be constantly exposed - agitation from the 
atmosphere. ‘These winds would almost incessantly operate, 
to drive’the waters through ne narrow mes of Michilimack- 
‘inac, either into Lake Huron or Lak e Micbigan; until, by 
tion; the ara the water, however, being governed by 
the taaying degrees of the force of the winds.”—pp, 37 
Letter from Maj. 8. A. Storrow. 
Farley, Virginia, Feb. 10, 1827. 
My dear Sir—An absence of more than three weeks pre- 
vented the previous receipt and acknowledgment of your fa- 
vor, which reached my residence at an early part of the last 
mon 
ting the subject of your letter—the ebb and flow 
of a tide in the great lakes, 1 regret that accident has pre- 
vented me from giving any information, beyond a vague and 
uncertain remembrance.” I made a series of experiments, 
embracing the following points; the mouth of the Black 
river near the outlet of Lake Qntario, Fort Gratiot at ne 
outlet of Lake Huron, the island of Michilimackinac, For 
Howard on Green Bay, and Fort Dearborn on the 2 Chicago. 
The notes and memoranda of these experiments, i was so 
contained them was destroyed by fire. I thus lost them = ee 
ever. I can therefore give you nothing sufficiently definite 
