ep he es Oe eer NST NS aaa eee eter 
ee 
W. inte arses eR: Qptical Notices. 51 
of meg and two parts of phosphorus, in four or five parts of 
bisulphid of Cegene and noe the iy dine 2 through a well 
ie er filter r, which is easil The refractive 
attained b continally adding phos robe to a saturated solu- 
tion of sulphur in Iphid o eqthon, in which phosphorus 
appears to ti ania: wi out limit. 
With a strong and probabl ee ts of sulphur in 
CS, the angle between Li and D was 0° 50’ 10”. When So 
phorus was added the angle was 2° 2! 30", the refracting 
= the oo dea 60°. this last case the angle between } 
o 2 20", “Pie eek ae was owen clear, 
the defniion of the dark nee lea’ 
nm 
* (nn. de Chins td Pysga 48 series, vol. iii, p. 373. 
Ann, de Chimie et de Physique, 4th series, vol. iit 5. 6. 
“sad Violet ray 
Ma 
The number 0°225 is ted pr Nana between the indices for the extreme red 
