nitrogen in the .suspended matter is high but as the river 

 rises there is a remarkable drop. This is fully brought 

 out in the following table: 



PERCENTAGE m- NITROGEN JN DRV STSI'ENDED MATTER. 



From this it is seen that the percentage of nitrogen in 

 the suspended matter during the months of August, Sep- 

 tember and October when the river is in flood, amounts 

 on an average to approximately "13 per cent, whereas dur- 

 ing the months of low Xile immediately preceding the flood, 

 it is five or six times as oreat. Taking the three flood 



~ o 



months of August, September, and October, it is seen 

 therefore that the nitrogen is lower than at any other 

 period of the year, and is confirmatory of the fact that as 

 a manure the sediment is comparatively deficient in this 

 ingredient. The percentages of phosphoric acid and potash 

 during the time of high Kile are not lower than at any other 

 period and both are present in sufficiently large amounts 



