626 Proceedings of the Royal Society of Edinburgh. [Sess. 
In their discussion we have dealt separately with the results obtained at 
Station B, Invermoriston (see Sketch Map), and at Station C, Fort Augustus. 
Preliminary Observations. 
A few observations were made at Station A (Invermoriston) in April 
and May when the water was of practically uniform temperature, about 42° 
F. On only one occasion was a current rate of over 5 cm. secs, observed, 
and at a depth of only 24 feet. Currents were indicated at both 500 and 
600 feet on the two occasions on which observations were obtained at these 
depths, although the winds during the period of observation were not very 
strong. The winds were also variable, so that no importance can be 
attached to the direction of the currents. For the observation at 500 feet 
the meter was left immersed for a week and the current directions varied 
from N. 30 W. to S. 40 E. When the meter was brought to the surface at 
the close of the 600-feet observation it was found that the compass box had 
disappeared, so that the directions were not recorded. 
Invermoriston Observations. 
During the period from 30th July to 5th September the observations 
show currents with a velocity over 5 cm. sec. in a direction opposite to 
that of the wind on seven occasions, viz. : 
Date. 
Velocity. 
Cm. sec. 
Depth. 
Feet. 
Direc 
Of Current. 
Don 
Of Wind. 
Aug. 7 
8-4 
6 
N. 51 E. 
S.W. 
„ 7 
74 
15 
N. 59 E. 
5 ? 
„ 10 
5T 
2 
N. 30 E. 
5 ? 
„ 27 
7-4 
15 
N. 45 E. 
„ 28 
11-2 
15 
N. 80 E. 
95 
„ 28 
12-3 
30 
N. 60 E. 
9 ? 
Sept. 3 
6-8 
15 
S. 10 W. 
N.E. 
On all these occasions it is seen that the return current takes place near 
the surface, both during S.W. and N.E. winds, and it is to be noted that the 
place of observation is during a S.W. wind near the windward end of the 
lake, and during a N.E. wind near the lee end. The observations on 3rd 
September are of interest, as although the wind was light the currents 
were strong. On 2nd September there was also little wind, and there were 
no appreciable currents. But it will be noted that on 3rd September there 
was a very strongly marked temperature seiche, and the currents recorded 
