GENERAL MANAGEMENT 335 



ing the blatant advertisements of their harmless 

 character. 



To turn into a stream any waste products is so easy 

 and so inexpensive a method of dealing with them 

 that the volume of pollution in most of our streams is 

 far larger than any of us realize. A steam laundry is 

 established on the bank of a river, and as a matter of 

 course when once the chemicals have done their 

 cleansing work they are sent into the stream and 

 disappear. A mill for preparing hides or tanning 

 leather requires a flow of water to remove the super- 

 fluous chemicals, and as a matter of course these 

 chemicals go into the stream. A garage on the 

 banks of the stream will in all human probability be 

 the means of adding the accumulations of the foul 

 lubricating fluid and oils, etc., used in cleaning the 

 machinery to the pollution of the river. Fear of 

 detection by the authorities will in many cases 

 impel the offending parties to take advantage of 

 the hours of darkness to carry out their nefarious 

 practices. 



The general practice of treating the surface of 



main roads with various tar 

 Road-tarring. products is one which has 



done so much to allay the 

 intolerable dust nuisance caused by the great increase 

 of motor traffic that no efforts of fishermen or others 

 interested in sport can hope to do anything to prevent 

 it or delay its further use. It is, however, not 

 unreasonable to hope that local authorities generally 



