They succeeded in 1923, thus proving both equally the power of Bohr’s principle and the truth in follow of Bohr’s text at the institute’s inauguration about the crucial job of experiment. The factor was named hafnium (Latin for Copenhagen). The existence of fine structure and hyperfine framework in spectral strains, https://ideadigest.de/die-rolle-von-bohrmaschinen-in-der-modernen-fertigung/