Spectra of Oxygem, Sulphur and Selenium. 17 



The atomic weights of elementary bodies heing directly pro- 

 portionate to these numbers, as I have shown in regard to the 

 Alkalies and Helium, and have also found to be true for other 

 metals, we obtain the following atomic weights, when taking 

 Sulphur = 32; viz., Alphaoxygen= 12-37 ; Betaoxygen = 4-40 ; 

 Selenium = 74 91 ; or in round numbers: Alphaoxygen = 1 2 ; 

 Betaoxygen = 4 ; Sulphur = 32 ; Selenium = 75. 



The last number falls short by four of the atomic weight, 

 found for that metalloid by chemists, but would seem to fit much 

 better into the map of elements as arranged by Mendelejeff. 

 Possibly Betaoxygen may enter into its constitution and thus 

 complete its full atomic weight. 



The principal series have been found to be represented by the 

 head line and second line in Alphaoxygen, and by the second 

 and third lines of Betaoxygen. Sulphur and Selenium have each 

 only one line. Of the two last mentioned my formula can take 

 no account ; of the two first I have computed the probable 

 Constants and a few additional members by availing myself of 

 Rydberg's now well known law and assuming the most likely 

 value for the modulus Jt. My results somewhat differ from the 

 values computed by Runge and Paschen. Further, and, I hope 

 not distant, observations may throw more light on the subject. 



