1. IX.The nucleus as radiator
2. IX. The vacuum spark spectra of some the heavier elements, and series classification in the spectra of ionised atoms homologous with copper, silver, and gold
3. Messrs. Meggers, de Bruin, and Humphreys, in a paper on the first spectrum of xenon, Bureau of Standards, no. 115733–733. state“Hicks and—have also discussed the structure of the first spectrum of xenon, but their results, too, are mostly spurious.”