Postelsta 65 
lake whose shore line is never subjected to ice 
disturbance and a low beach flora which does 
not have to bear the incessant impact of surf or 
strong winds, for so effectively hemmed in is the 
lake by the high and heavily timbered slopes 
that strong and lasting wind currents of prevail- 
ing direction do not obtain. Furthermore the 
expanse of water is not great enough to allow 
the shifting air currents that reach the,lake to 
develop any surf action on this or that shore. 
The lake is fed by one fair sized stream and by 
a number of brooklets from the surrounding 
mills the {per cent of organic amatier im, its 
waters is necessarily comparatively large. 
With regard to the topography and structure 
of the beach only a few words will Le set down. 
For some distance along one end of the lake, 
the slope drops off rather suddenly in rocky 
ledges and here the beach is only a few meters 
wide. In front of gullies or ravines, the filling 
in has been greater and a wider beach is the 
result. On the side where the main stream that 
feeds the lake flows in, a considerable stream 
delta has been formed. The beach here is large- 
