126 



POOTTOOR WELL. 



The water from the bottom when first brought up, smelt strongly 

 of sulphureted hydrogen. 



The surface of the fresh water is 14 feet below the ground line, 

 and the total depth of the well varies between 140 and 145 feet. 



Dr. Ferguson of the Army Medical Staff kindly assisted me in 

 making these experiments. 



It being desirable to ascertain how far the tide in the well coin- 

 cided with that of the sea on both coasts, Dr. Ferguson and my- 

 self at the well and two assistants at Jaffna and Valvettytorre 

 respectively, took notes at every half hour from 6 a. m., till 6 p. m. 



The following is a tabular statement shewing the rise and fall of 

 the tide observed at all three places in inches. 



lime. 



Jaffna Lake. 



Well at Poottoor. 



V al vetty torre . 



6* A. M. 





• 







• 



• 



630 



jf en 







Fell 



•12 



Fell *36 



7*0 



>? 



•60 





55 



•06 



55 '60 



7*30 





•84 





55 



•06 



55 *84 



8*0 



)? 



•96 





55 



06 



„ 2-04 



55 



8-30 



?j 



1-08 





55 



•06 



„ 2-64 



9-0 



j> 



1-32 





55 



•06 



3-12 



9-30 



?> 



1-44 





Rose .03 



„ 2.40 



10-0 



j? 



1-08 





55 



•15 



55 2-40 



10-30 



55 



1-08 





■55 



•12 



5, 2.40 



11-0 



55 



1-20 





55 



•12 



5, *96 



11-30 



55 



•72 





55 



•12 



„ -48 f low 



11-3 



55 



•84 





55 



•18 



Stationary (water 



12-30 p. m. 



55 



•84 





55 



•06 



•48 



1-0 



55 



•60 





55 



'06 



•48 



1-30 



55 



•60 



| low 



?9. 



•06 



-96 



2-0 





•12 



Fell 



•15 



•96 



55 





i wat. 









2-30 



Ros< 



3 -24 





55 



•18 



1-92 



3-0 



55 



•48 





55 



•18 



3'28 



3-30 



55 



•96 





55 



k 12 



1-68 



4-0 



55 



1-56 





55 



•12 



1-20 



4-30 



55 



1-08 





55 



.12 



1-92 



5-0 



53 



•72 





55 



•12 



1-44 



5-30 



5' 



1-08 





JJ 



•12 



•24 



6-0 



1 „ 



1-20 





5' 



•48 



•24 



