6672-20  H alfa narrow set
   2 x 2" both faces coated
   R. Gonzalez  Sept.19, 1993

   W.l       %
   6636     0.76
   6638     1.38
   6640     1.86
   6642     3.79
   6644     6.88
   6646    11.84
   6648    18.66
   6650    32.90
   6652    46.37
   6654    58.31
   6656    67.76
   6658    72.82
   6660    71.97
   6662    70.41
   6664    67.91
   6666    63.05
   6668    53.07
   6670    41.80
   6672    27.53
   6674    14.27
   6676     8.49
   6678     6.14
   6680     3.89
   6682     2.59
   6684     1.75
   6686     1.13
   6688     0.88
   6690     0.64
   6692     0.51
   6694     0.46
   6696     0.40