Date 



Havy Yard, 

 BoBton 



Chlorine as CI 



Naval Drjioclss, 

 South Boston 



Chlorine as Cl 



Lockwood Basin, ' 

 East Boston 



Chlorine as Cl 



East Jetty at 

 Ifaral Dry- 

 docks, South 

 Boston 



Chlorine as 

 Cl 



Grains per gal 



Grains per gal 



Grains per gal 



Grains per 

 gal 



19^6 



Septeniber 

 Octo'ber 

 November 

 December 



19^7 



January 



February 



Ifexch 



April 



May 



Jtme 



July 



August 



September 



Octo'ber 



November 



December 



1948 



January 

 Fehruary 



952 



980 



1,000 



1,001 



990 

 980 

 951^ 

 878 



915 



951 



982 



1,012 



993 



1,022 



91^0 



992 



1,003 

 1,015 



92k 

 981 

 982 

 986 



989 

 975 

 892 

 924 

 925 

 827 

 986 

 ,980 

 983 

 1,008 



931 

 962 



1,000 



1,023 



937 

 977 



982 



987 



l,Oll|- 



980 

 918 

 852 

 968 

 952 

 986 



99^ 



973 



1,010 



933 



980 



996 

 1,006 



971 



98i^ 



1,008 



997 



1,023 

 986 



951 

 968 

 910 

 891 

 997 

 1,000 

 1,000 



1,015 

 969 

 973 



1,020 



1,036 



l^2 



