1867.] 



with the supply 'of water to Calcutta. 



131 



Tank and well waters. 



Table VIII. 



For 100,000 fluid grains. 









Orga- 



Oxigenl 







Date of col- 



Solid 



nic 



req. to J Ammo- 





lecting. 



matter. 



matter. 



oxidise. 



nia. 







grains. 



grains. 



grains 



grains. 



General's Tank, ., ...... 



7th Oct. 



9.83 



2.11 









24th Jan. 



9.05 



1.59 





.017 



Monohur Doss' Tank, ... 



9th Oct. 



12.80 



195 









25th Jan. 



12.33 



1.24 





.026 



Dalhousie Sq. Tank, ... 



9th Oct. 



20.30 



1.90 









21st Jan. 



25.38 



2.33 





.044 



Ramdhone Ghose's Tank, 



18th Feb. 



6.6.25 



4.62 









15th Feb. 

 22d Feb. 



46.00 

 105.25 



4.05 

 4.56 





.045 



Well, 





Nyan Chund Dntt's 















22d Dec. 



72.50 



6.25 



.316 





Well, 



22d Dec. 

 16th Dec. 



97.00 

 107.20 



5.20 

 8.00 



.060 

 .172 









Manictollah Well, 



16th Dec. 



187.20 



12.90 



.200 





PuttureaghatSt.Well.,... 



8th Dec. 



158.01 



9.23 



.281 



.660 



Nimtollah Street Well, . . 



8th Dec. 



278.60 



21.23 



.882 



.700 



River water from street 















16th Dec. 



20.80 



1.80 



.102 









The first three are well known tanks referred to in my first paper ; 

 Ramdhone Ghose's Tank, Jaun Bazar, is that also noticed there,* near 

 Mr. Dall's school, the water of which has since become much cleaner, 

 and the Baranagar Tank is also that referred to there, the well being 

 an old one on my own premises. 



As to the remainder, some explanation is necessary. I was 

 requested by the Municipal authorities in December last to examine 

 some waters in the northern part of the town, with reference to a pro- 

 posed public tank to be excavated there, and the results are included 

 in the table. Of these Nyan Chund Dutt's Lane Tank and Well and 

 Blaquiere's Tank are old sources of supply ; the three latter " wells" 

 were simply holes dug in the ground 8 or 9 feet deep to collect water 

 for examination : the water from the aqueduct was supplied at my 

 request for comparison. 



Another table will exhibit a few more points for comparison. 

 * Called Dhurrumtollah Tank by mistake. 



