88 



FORESTRY AND IRRIGATION 



February 



years ago, presents a marked change. 

 Ten years ago they were clear, and 

 remarkably free from sand and 

 debris ; now they are full of sand, silt, 

 detritus, and washings, which have 

 filled up the channels, and which in- 

 crease enormously the expense and dif- 



ficulty of purification, so that many 

 cities now face not only a shortage 

 of water during the rapidly lengthen- 

 ing drought periods, but unknown dan- 

 gers in what they do get. As an ex- 

 ample, the City Engineer of Augusta, 

 Ga., states that their power canal 





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Forest scene in the Southern Appalachians — Little opportunity for swift 



rush of water 



