Always been fascinated by spectra: Back in the dark ages, in 1963 I think, when I was still in High school, I made an optical spectroscope out of bits of scrap - even made by own slit mechanism. "Borrowed" gas discharge tubes from the school science lab and took pictures through a real box-Brownie - yes they made them with real film. Took photos of various spectra - to the limit of the school's supply of tubes. The tubes and lenses were cribbed from anywhere I could find them. I suppose it was a miracle it worked optically but it did.
Peter
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