COLOUR OF WATER. 265 



length, when the vegetable extract is large 

 in quantity — as in countries where peat is 

 found — yellow, and even brown. To men- 

 tion instances, the Lake of Geneva, fed from 

 sources (particularly the higher Rhone,) 

 formed from melting snow, is blue ; and the 

 Rhone pours from it, dyed of the deepest 

 azure, and retains partially this colour till it 

 is joined by the Soane, which gives to it a 

 greener hue. The Lake of Morat, on the 

 contrary, which is fed from a lower country, 

 and from less pure sources, is grass green. 

 And there is an illustrative instance in some 

 small lakes fed from the same source, in the 

 road from Inspruck to Stutgard, which I 

 observed in 1815, (as well as I recollect,) 

 between Nazareit and Reiti. The highest 

 lake fed by melted snows, in March, when I 

 saw it, was bright blue. It discharged itself 

 by a small stream into another, into which a 

 number of large pines had been blown by a 

 winter storm ; or fallen from some other 

 cause : in this lake its colour was blue green. 

 In a third lake, in which there were not only 

 pines and their branches, but likewise other 



