3038 
his measurements on the antimony Spectrum, and which are inserted 
in Karser’s Handbuch der Spectroscopie, 1 came across some lines 
which I never found on my plates. They are the lines 4370, 4295, 
4287, 4091, 4078, 4038, 4024, 4006, 4004, 3979, 3721, 3467, 3460. 
From some experiments which I made with the purpose of ascertaining 
whether these lines existed, I think I have to conclude that SCHIPPERS 
was mistaken, and took lines of the third order for lines of the 
second order. These lines are in my opinion successively the following 
lines of the third order: 2913, 2863, 2858, 2727, 2719, 2692, 2683, 
2671, 2670, 2653, 2480, 2311, 2306. 
Besides my own results I have recorded those of Purvis in the 
tables. I did not, however, use the intensity of the field which he 
gave, because this value is undoubtedly too high. Instead of this I 
have ascertained by the aid of my results what field intensity Purvis 
used by comparing the average of his results with the average of 
mine; this separately for every element. Thus | found successively 
for tin, lead, antimony, and bismuth 30400, 31100, 28700, 31100 
Gauss. Corron estimates the field intensity used by Purvis at 30800, 
he himself gives 39980 Gauss. For the better mutual comparison of 
dd 
the results those of Purvis for = have been divided in the sub- 
joined tables by the above mentioned field intensities. 
The wavelengths are recorded in round values in international 
° 
Angstrom units. 
4. Discussion of the Tables. On one of the photos for tin, on 
which the two kinds of components appeared at the same time, 
were further seen the quadruplets 2368 and 2762 (are line), which 
had successively the values 34.6 (3), 48.0 (2), and 49. (2), 56.6 (3) 
as values for (d4:2°H).10'*. The values between parentheses indicate 
the weight. 2266 and 2408 are split up. The amount of the splitting 
up cannot be measured, but amounts successively to less than 76 
and 59. 2355 is probably split up. 
For antimony the air line 3640 given by Scurerrs is also observed 
as split up. Of this (dé: 2*H) .10'* = 66.2, weight 3. 
There are some among the Bismuth lines, for which we should 
be cautious when judging about the splitting up. In what follows I 
shall indicate by an s everything that refers to vibrations normal to 
the lines of force, a p marks what refers to vibrations parallel to 
the lines of force. 
3068. The s-figure was on some photos a triplet of asymmetric 
intensity. Then the corresponding p-figure was a doublet, which 
