Changes in the wave-frequencies of the lines of emission spectra of elements . f-i^^^-tt^^U^ ,:^^>^f-in^^^UyV ^/^Jc-A^ C»--i^tM- .^-i^^e-^il^^^i^, ..^^,tfi-«-«>*^^^^ ./i-*^ U/~t(c^^cX. 77 / /^/l ^?C ^i-t^»^-t<t<f<.*-.


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Keywords: ., boo, bookcentury1800, bookdecade1890, booksubjectspectrumanalysis