342 Mr Purvis, The influence of a very strong magnetic field 



d\jx 2 



In 



tensity 



2427-1 



2421-0 



+ 1-31 





 -1-31 



+ 1-37 





 -1-37 



2415-8 



+ 1-27 





 -1-27 



2396-6 



+ 1-62 





 -1-62 



2392-3 





2366-8 



+ 1-71 





 -1-71 



2346-6 



+ 1-46 





 -1-46 



2334-8 



+ 1-95 





 -1-95 



2327-6 









The middle constituent removed by calcite. 



do. 



do. 



do. 



The constituents are too weak to measure. 



The middle constituent removed by calcite. 



do. 



The constituents are too weak to measure. 



The following lines become doublets, but they have not the 

 same appearance. The constituents of several of them seem to 

 be equally sharp on both edges ; whilst the inside edges of others 

 are sharper and stronger than the outside edges. There are 

 probably other constituents overlapping, but they are too weak 

 and diffuse to measure on separation by the calcite. The measure- 

 ments were taken between the centres of these aggregates. The 

 values of d\j\* for the constituents of 3748'5 are comparable with 

 those of the strong constituents of the quadruplet of 3280 - 4; and 

 those of 2819'1 with the strong constituents of the quadruplet of 

 3461-9. 



