He also devised one of the first instruments for the study of nuclear radioactivity, the spectral analysis, introduced by Bunsen and Kirchhoff, was received by Crookes with great enthusiasm and to great effect.
He also devised one of the first instruments for the study of nuclear radioactivity, the spinthariscope. The method of spectral analysis, introduced by Bunsen and Kirchhoff, was received by Crookes with great enthusiasm and to great effect.