Changes in the wave-frequencies of the lines of emission spectra of elements . J3ir z^-i^-L-^ii^l-n^^-^ ^-T-t-^Z^*-^^-t.^^^5<^y ,^^i?t^ t^T-tAy <2<!<C5i-7-*^^^;c^a^Cts x<-t^«^<i^

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Keywords: ., boo, bookcentury1800, bookdecade1890, booksubjectspectrumanalysis