L. VEGARD. 



-N. Kl. 



line at about 4266,8, while in 1912—13 this line was not distinctly seen 

 on the plate. A faint line 4200, was just noticeable on one of my plates 

 from the year 1912—13. 



With the small glass spectrograph III the strongest lines (even with 

 pancromatic plates) could be obtained with a time of exposure of 30 — 60 

 minutes. 



A considerable number of exposures have been made with this spectro- 

 graph, but only a few have been found sufficiently good for measurements, 

 many of them showing only the same strongest lines that were more accurately 

 determined with the two big spectographs. But in order to see how many 

 lines could be expected in the blue and violet part of the spectrum a plate 

 was taken (nr. 1 7) which was exposed for 6,8 hours. 



Table II. 

 Spectcograph III. ( Small glass spectrograph.) 



The spark of Cci used for comparison. 



In table II are given the lines measured on some of the plates with 

 a fairly small time of exposure. The last column contains the lines measured 

 on the plate nr. 17. As we see, 20 lines have been measured, and probably 

 some more lines can be traced by means of the micro-photometer. 



An estimate of the intensities as they appeared on the plate nr. 1 7 

 is also given in the table. 



