1908-9.] Temperature Observations in Loch Garry. 
Ill 
Seiche Observations. 
A few seiche observations were made, as occasion permitted, by means 
of an index limnograph. Six of the best of these observations are 
shown in fig. 5, and it will be seen that the curves are most disappoint- 
ingly irregular, and on several other occasions when observations were 
made there were no oscillations to measure. The period of the uninodal 
seiche is from 10 '5 to 11*1 minutes, and of the binodal about 5 '5 minutes. 
The greatest amplitude observed was 3 inches. The basin of Loch Garry is 
pretty regular, and its axis is practically straight ; so that it is difficult 
to assign any cause for the behaviour of the lake. It may have been 
my misfortune always to observe at a time when seiches were irregular or 
absent, and of course with the index limnograph it is impossible to observe 
in stormy weather. But if the observations had been made in Loch Earn, 
it would hardly have been possible to observe on six occasions with such 
barren results as we had in Loch Garry. It may be that the small basin 
