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NATURE FOE ITS OWN SAKE 



a peat- water lake, like Loch Laggan in Scot- 

 land, the white clouds show gray, the graj- 

 clouds look sooty or smoky, and the cerulean 

 blue of the sky turns to deep ultramarine. On 

 Loch Dhu, a dark little lake in the Grampians, 

 surrounded by high hills covered with nothing 

 but bluish stone and yellow-green grass, one 

 can see in the wave reflections, the grass 

 turned to dark orange and the stones to cobalt- 

 blue. Dark local tones in the water will 

 darken the colors in reflection, and light tones 

 will lighten them. A muddy or yellow lake will 

 not reflect a brilliant hue of any kind without 

 bleaching it. As for waters neither light nor 

 dark, but nevertheless positive in hue, they 

 will often tinge the reflection with their own 

 intensity. Thus the waters in the Venetian 

 canals reflect the side of a black gondola, but 

 the reflection is not black ; it is greenish the 

 local color of Venetian water. Again in de- 

 termining hues, local or otherwise, much de- 

 pends upon the angle from which lights, colors, 

 and reflections are seen. From one point of 

 view the lake may be all local color ; from an- 

 other point of view it may be all sky reflection. 

 So that when the disturbing elements taken to- 

 gether are considered, the problem for deter- 



