On the X-Ray Absorption Wave-Lengths of
β Duane W., Shimizu T.
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β Scribed by Clarke F. W.
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When Bertrand Russell discovered an unresolvable contradiction in Gottlob Fregeβs (1848-1925) logical system, the effect was calamitous, embittering Frege and overshadowing his important work in analytical philosophy. Fregeβs student, Rudolf Carnap, took detailed notes of his lectures that show how