62 Mr Parvis, The influence of a strong magnetic field 
General results of Titanium. 
The more important results of the preceding observations are: — 
1. There were several types in the appearances of the divided 
lines. Some of the lines separated into diffuse constituents whilst 
others were sharp and well defined. Amongst the triplets the 
general rule was that the middle constituent was at least twice 
as strong as either of the others ; but there were several having 
the three constituents almost equally strong. Also there were 
several which had two sharp and strong outside constituents 
whilst the middle one was weak and diffuse. 
2. The line 3252‘03 divided into six constituents, and the 
values of dX/X 2 appear to have the simple ratio 1:3:6. 
Amongst the lines which divided into four constituents there are 
several whose values of dX/X 2 are simple multiples of one another, 
and there are several which can be compared together in having 
identical values of dX/\ 2 , and this comparison extends to their 
appearance and their polarisation. 
3. Amongst the lines which became triplets, there are some 
which can be compared in a similar way. And also the values 
of d\/ X 2 for the constituents of some lines are simple multiples 
of those of other lines. 
4. There were a number of lines, very like bands, sharper on 
the more refrangible edges and diffuse and weak on the less re- 
frangible. These became sharper and narrower, and the strongest 
of them were divided into somewhat diffuse triplets. There were 
several weak band-like lines which were widened, but no division 
could be seen, and they were too weak to shew anything on the 
plate when analysed by the calcite. 
5. The constituents of the strongest and most intense lines 
were not usually separated farthest apart. Amongst the triplets 
the weaker lines usually gave higher values of dX ; corresponding 
to similar observations of the divided lines of other metals in- 
vestigated. 
Chromium. 
The lines were identified and compared with the measurements 
and descriptions of Exner and Haschek (Sitz. d. k. Akad. Wien, 
1897, Yol. cvi. II A . Abth. p. 1133). The divided lines of chromium 
shewed many different types ; and in most of the elements hitherto 
observed, the number of constituents was usually greater amongst 
the lines of smaller refrangibility, whilst in chromium there are 
a number of lines of high refrangibility which have more than 
three constituents easily separated from each other. 
