11) HARDNESS INDICATOR CODE 290
Manufacturer: BETZ LABORATORIES, INC.
Index Date: 1991-02-16


12) HARDNESS TITRATING SOLUTION CODE 292
Manufacturer: BETZ ENTEC INC
Index Date: 1988-10-31

13) HARDNESS INDICATOR, #290
Manufacturer: BETZ LABORATORIES INC
Index Date: 1995-08-29

14) HARDNESS BUFFER SOLUTION
Manufacturer: CALGON
Index Date: 1990-10-24

15) HARDNESS BUFFER
Manufacturer: POLYSCIENCES,INC.
Index Date: 1994-02-21

16) 290 HARDNESS INDICATOR
Manufacturer: BETZ LABORATORIES INC
Index Date: 1988-10-31

17) 290 HARDNESS INDICATOR
Manufacturer: BETZ LABORATORIES, INC.
Index Date: 1995-09-07

18) 22245, HARDNESS MONITOR BUFFER SOLUTION (SU
Manufacturer: HACH CO
Index Date: 1987-07-28

19) HARDNESS REAGENT BUFFER UNIVER 2, 816
Manufacturer: AQUA TREAT CHEMICALS INC
Index Date: 1989-11-01

20) HARDNESS BUFFER SOLUTION, 909
Manufacturer: AQUA TEST CHEMICALS INC
Index Date: 1989-11-01