88 



FORESTRY AND IRRIGATION 



February 



years ago. presents a marked change. 

 Ten years ago thcv 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- 

 cre; >e 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 dr night periods, but unknown dan- 

 ger.-- in what thev do get. As an ex- 

 ample, the City Kngineer of Augusta. 

 Cia.. >tate> that their power canal 



Forest scene in the Southern Appalachians Little opportunity for swift 



rush of water 



