1856.] 



Silt held in suspension by the Hooghly, 



153 



Table I. 



Tabular statement of the amount of silt held in suspension by the 

 surface water of the Hooghly, at Calcutta, for each tfionth, April, 

 1854 to March, 1855. 



No. 



Date. 



<4h 

 O 



3* 



t»H ■ 



O *"• 



-M 



03 c3 



■a * 



§.2 



■si 



otal of solid 

 matter, silt 

 and lime. 



ime found in 

 he solid 

 natter only. 







<y 



w 



O^! 



H 



\A~ " 





1854. 



oz. 



grs. silt. 



grs. 



grs. 





1 



3rd April, 



22.70 



0.50 



3.92 



4.42 





2 



4th May, 



21.80 



0.60 



1.52 



2.12 





3 



5th June, 



30.00 



0.60 



2.61 



3.21 



Trace. 



4 



4th July, 



23./5 



4.25 



0.58 



4.83 





5 



5th August 



23.80 



11.75 



0.32 



12.07 





6 



1st September, . . 



23.60 



4.0$ 



1.17 



5.17 



Trace. 



7 



1st October, .... 



23.20 



2.88 



1.44 



4.32 





8 



4th November, . . 



22.00 



1.20 



0.59 



1.79 





9 



1st December, .. 

 1855. 



25.00 



4.20 



1.35 



5.55 





10 



10th January, .. 



25.50 



3.65 



0.47 



4.12 





11 



3rd February, . . 



24.00 



5.25 



1.95 



7.20 





12 



8th March, 



24.30 



0.75 



1.75 



17.67 



2.50 







Totals,. . 

 Means,.. 



289.65 



39.63 



57.30 







24.14 



3.30 



1.47* 



4.77 





* Less magnesia 0.254 per month. 



