1889.] of the various Species of Heavenly Bodies. 



This also occurred in the following comets : 



171 



Lead Radiation. 



When to the radiation of carbon and manganese that of lead is 

 added (546 fluting), three maxima are seen, as shown in fig. 4. 



Hot carbon radiation. 



Manganese radiation. 

 Lead radiation. 

 Integrated result. 

 Comet III, 1881. 



Fig. 4. Diagram showing the result of the integration of hot carbon, manganese, 

 and lead radiations, compared with the Spectrum of Comet III, 1881. 



This condition has been recorded in two comets, as in the following 

 table : 



* * Bothk. Beob.,' vol. 1, p. 60. t ' Spect. der Cometen,' p. 60. 



J ' Spec, der Cometen,' p. 61. ' Monthly Notices,' vol. 37, p. 432. 



|| ' Copernicus,' vol. 2, p. 241. ^[ ' Copernicus,' vol. 2, p. 225. 



** * Coperniciis,' vol. 2, p. 228. 



