100 



Silt held in suspension by the Hooghly. 



[No. 2. 



The amount of magnesia was also checked by re-converting the 

 phosphate of magnesia into the carbonate ; and although the average 

 of 7.60 grains in 24.89 oz. of the water may appear large, I found 

 that water taken from the middle of the Bay of Bengal* gave for 

 23f ounces of water as follows : 



Middle of Bay. Gasper Channel, Deer. 

 Water, 23f oz. 26.00 oz. 



148.75 grs. 



Mur. Soda, 263.25 grs. 



Magnesia, 8.09 7.04 



Insoluble salts, sulphate and 



carbonate of lime, J .. .. .. 6.50 8.75 



The following table will give at one view, the results of the eleven 



months for which I obtained water. 



Table III. 



Tabular statement of the amount of silt and of earthy salts held in 

 suspension at the mouth of the Hooghly below Saugor ; at a mean 

 depth from 2\ to 3 fathoms, at the Gasper Channel Floating 

 Light Vessel, in Lat. 21° 26' JST. ; Long. 88° 04/ Last. 









^ 



s-T 







-s -a 











Cm 



O 







<4_ X 



o o 



as 



O cS 















<u £ 



~o . 





rz 



*" 





No. 



Date. 



\3 oj 



03 h 



as a 

 o a> 



D = C 



3 * 2 



a 



bo 





a 









1 1 



t3 st 



'is s 



CJl-G 





S 



3 OS'S 



o a O 



s-a 



S 







Of 



CO 



o 



w 





h3 



04 





1854. 



OZ, 



prrs 



grs. 



grs 











1 



1st March,.... 



24.50 



0.50 



8 40 



0.40 



12. 



21.30 



0.00 





2 



15th April, 



2400 



3 50 



5.20 



2.50 



7.90 



19 50 



0.00 





3 



1st May 



24.30 



1.25 



4.45 



5.60 



2.54 



13 84 



1.25 





4 



15th June 



24.50 



1.00 



9 50 



4 25 



1448 



30.23 



1.00 





5 



15th July, ,... 



26.00 



1.00 



6 50 



1 12 



4 20 



12.82 



1 00 





6 



24th August,.. 



22 50 



2 75 



3,50 



60 



676 



15.01 



275 





7 



1st September, 



25.50 



1.00 



7 60 



3.25 



3 30 



15.15 



1.00 





8 



4th October. .. 



25 20 



2.25 



10.25 



50 



4.60 



18 10 



0.00 





9 



1st November, 



24.75 



2 75 



400 



0.75 



4.58 



1208 



0.00 





10 



2nd December, 

 1855. 



26.00 



1.50 



7.00 



1.75 



7.04 



1729 



00 





11 



1st January, .. 



26.50 



1.15 



9 90 



1.60 



10 20 



22.85 



0.00 





12 



1st February ,t 



24,89 

 298.64 



1.69 



694 



2.03 



24.35 



2 03 



7,60 



18.92 



0.64 







Total,.. 



20.34 



83. 



86 20 

 7.60 



217.09 

 18.92 



7.64 







Means,. . 



24 89 



1 69 



6.94J 



64 





* Of which T happened to have a bottle sent me by a friend some years ago. 

 t Average only from preceding 11 months, 

 tin solution this is of course a muriate. 



