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#1
November 21st 03, 05:32 PM
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Dr. Paul's solar prominence filter????
Does anyone know what happend to Dr. Henry Paul's solar prominence
filter as described in the ATM series of books, Book Three, I think. It was made of a stack of quartz plates of various thicknesses. I wonder how this type of device compares to modern day interference filters? I believe this was called a Lyot Quartz Monochromator. 
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