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Studies of currents using current meters at fixed locations on Lake Michigan during the winter of 1962-63 is provided. This report includes data on the ranges of current speed and direction with respect to time and depth, and relates these generally to wind movements recorded simultaneously at the U.S. Weather Bureau Station at Midway Airport, Chicago. It is demonstrated that under varied conditions water will tend to move in a particular direction for prolonged periods of time. Present studies indicate that a particular direction of flow may be maintained for up to six days and perhaps longer. Under such conditions, and introduced effluent could move en masse for a long period of time and be transported many miles. Calm periods, exceeding a day or more with little or no flow, could occur at any time of the year.