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CSM Chuck Stafford
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Noooo! it cut off just as he said for example....
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Maj John Bell
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1bf34549
Sorry..., had to do it. I know where to go and how long to stay.

https://www.wikihow.com/Use-Dowsing-or-Divining-Rods
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Lt Col John (Jack) Christensen
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Interesting, but the moment he mentioned prisms just confirmed its all smoke and mirrors :-))
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Sgt Commander, Dav Chapter #90
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Yes, on some equipment, finely tuned prisms were (are?) used initially, but for more accurate measurement and analysis of chemical spectra, Optical spectroscopy is used...
Check out more at Wikepedia.com - Astronomical spectroscopy- Optical Spectroscopy
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Sgt Commander, Dav Chapter #90
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