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SCENERY OF SWITZERLAND. 
finally disappear, the dirt remains, and forms the 
bands. They are therefore quite superficial. Similar 
bands occur on other glaciers with ice cascades, 
and as many as thirty to forty may sometimes be 
traced. 
Moulins. 
At night and in winter the glaciers are solemn 
and silent, but on warm days they are enlivened by 
innumerable rills of water. Sooner or later these 
streams reach a crack, down which they rush, and 
which they gradually form into a deep shaft. These 
are known as glacier mills or Moulins. Of course 
the crack moves down with the glacier, but the same 
cause produces a new crack, so that the process re- 
peats itself over and over again, at approximately 
the same place. A succession of forsaken Moulins 
is thus formed. Moulins are often very deep. Desor 
sounded one on the Finster-Aar glacier which had a 
depth of 2 32 metres. 
The so-called Giants’ caldrons, which will be de- 
scribed further on, are sometimes regarded as in- 
dications of ancient glacial action. In the so-called 
“glacier garden” at Lucerne this no doubt is so; but 
as a general rule they were probably formed by river 
action. 
