Scott: Lakes of Tippecanoe Basin 



13 



the return currents took place above the discontinuity, sometimes 

 very near the surface. It also appeared that the return current 

 was nearer the surface at the windward than at the lee end of the 

 lake, which is natural, as it might be expected that they would 

 follow the direction of the isotherms." 



A study is being made on Winona lake to determine the details 

 of the effect of the wind on the lake during the summer stagnation 

 period. A preliminary statement of the results of the findings 

 may be stated here. The immediate object was to determine 

 the depth, direction, and velocity of the currents caused by wind 

 in the different parts of the lake. The determination of the 

 velocity was not accurate, because the current meter used was 

 so constructed that the vertical motion of the boat, tossed by 

 waves, influenced the rate of revolution. A meter is now planned 

 that I think will eliminate this error. 



The direction of the currents was determined with a vane. 

 This vane was constructed of galvanized iron, 60 cm. long, 30 cm. 

 wide at one end, and 20 cm. wide at the other. This was riveted 

 into a rod 2 M. long and weighted so that it hung vertically. 

 To the upper end of this rod was attached a bicycle hub which 

 served as a handle and supplied ball bearings to the apparatus. 

 One set of readings is given on the accompanying outline of the 

 lake. 



At 11 a.m. after there had been a rather high wind for two or 

 three hours, observations were made at Station I. The water in 

 the first meter was moving in the direction of the wind, i.e. to 

 the southeast. In the second meter, and as far down as I could 

 lower the vane, the water was moving in the opposite direction 

 to that of the wind. 



At 1 :30 p.m. the upper two meters were moving in the direction 

 of the wind. At Yarnell Point the water was moving in the general 

 direction of the wind but parallel to the direction of the shore. 

 At the south shore pier it was moving at approximately right 

 angles to the wind. At Boys' City pier, 100 ft. from shore, the 

 water was moving in a direction opposite that of the wind. At 

 an anchored pier nearly 200 ft. from shore at the surface and 

 as far down as we could determine the water was moving north- 

 west, opposite the wind. A final reading was made at Kosciusko 

 pier. At the base of this pier the water was flowing parallel to 

 the shore and in the general direction of the wind. At the end 

 of the pier, 132 ft. from the shore, the water was moving more 

 nearly at right angles to the wind, i.e. toward the southwest. 



