The Intensities of the Lines in the Spectrum of Mercury

Number of quanta emitted per atom.—The total radiation, measured with a thermocouple, in the spectral region 6000 to 2300A from a small quartz mercury lamp of known size filled with mercury vapor at a known pressure was 1.85×${10}^{-10\mathrm{}}$ ergs per atom per sec. From this and the intensities of the lines it came out that each atom on the average emitted each second 11.4, 8.9, 5.0, 2.3, etc., quanta of yellow, green, blue, violet, etc., light, respectively.