1008 Wisconsin Academy of Sciences, Arts, and Letters. 
It should also be noted that the position of the yacht, (Fig. 
1) where the temperatures were taken, was singularly well 
adapted to show movements of the water caused by wind and 
ill adapted for recording seiches. It lay close to the shore, 
about 300 yards from the southwest end of the lake and in 
300 feet of water. The main lake extended, like a broad 
river, for 20 miles to the northeast. Every northeast wind 
must fill this end of the lake with warm surface water, and 
' Fig. 1. Sketch map of the south-west 
end of Loch Ness, showing posi¬ 
tion of yacht used as observing 
station. Scale, 1. 5"=1 mile. 
every southwest wind must blow it out again. The yacht lay 
so close to the shore that the underwater movements induced 
by wind must readily affect the temperatures. Every student 
of lake temperatures will also notice the fact that the yacht 
lay at one side of the outlet of the small bay that forms a 
pocket at the end of the lake. Any wind that pushed the 
water at all obliquely against the southeastern shore would 
fill this pocket and thence the warm water would gradually 
work out toward the yacht, moving up toward the northern 
shore. 
The observations of August, 1904, are far more valuable 
in this discussion than all of the others combined, since they 
were taken at frequent intervals day and night; the thermocline 
was present; and the force and direction of the wind were re- 
