Agricultural Use of Sewage 



407 



vided the canals are carrying constantly a sufficient volume of 

 water to make the needful dilution. The disposal of the sewage 

 of the city of Milan in this manner has already been referred to 

 as extremely satisfactory from the agricultural point of view. 



In speaking of the opportunities for and the desirability of 

 improving sandy lands in various parts of the eastern United 

 States and in the South by silting, it was pointed out that many 



Fig. 125. Instruction of practical gardeners in garden irrigation. 



hundreds of square miles of now nearly worthless lands could be 

 reclaimed by methods of irrigation, and wherever this shall be 

 undertaken the disposal of the sewage of the same sections 

 through the canal waters could not fail to be of great advantage 

 to the lands when applied either in winter or in summer. 



Outside the walls of the city of Paris, on the once nearly 

 worthless gravelly sands of the Seine, is located a garden whose 

 sign is represented in Fig. 125, where, in the midst of a district 



