1908-9.] Observations with a Current Meter in Loch Ness. 623 
The observations in Loch Garry were so satisfactory, and showed so 
clearly the existence of a return current to supply the place of water carried 
along at the surface by the wind, that the Loch Ness observations were 
looked forward to with confidence. But the Loch Ness observations have 
proved so complicated that the authors do not pretend to understand them 
fully, and in what follows they have endeavoured to select from the observa- 
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I — i — i — i — I — - t — r— i — r 
o 
MILE SCALE 
“i 1 r 
7 2 3 
Fig. 2. 
4 MILES 
tions such as they think they are able to explain. Most of the observations 
are tabulated in the Appendix to this paper, as they will be of interest for 
comparison in the event of current measurements being made in other lakes. 
Numerous temperature observations were also made in Loch Ness to 
correlate with the current observations. These also are given in the Appendix. 
The Invermoriston temperature observations for every fifty feet are shown 
graphically in fig. 3. The temperature changes at the surface and 50 feet 
are evidently chiefly due to the changes of wind ; but the observations at 
