5 thoughts on “Waves with Ridges

    1. This is most presumably a misunderstanding.
      Jane Swain: click on the sentence “waves with ridges chart” under the picture.
      Regards from Germany,
      Susanne

  1. Once you get used to a chart, you’ll find you love it. Maybe it works best if you have a visual memory, but don’t be intimidated by a chart. It’s easier to follow than alphanumeric instructions. Reading those can drive you crazy!

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