Tniton. 
Phil. Ti'ajis., A, vol. 197 , Plate 9 . 
Series 1. Ordiiiari/ Ternperature. 
For Li-light. 
For Na-liylit. 
A > > 
X > ■» 
For F-light. For light of wave-length 4G6. 
For Na light. 
For Li-light. 
Series 2. 'Tenpenitirre of 78°. 
For C-light. 
Intekfekexce Figekes aeeoedei) by C.-ESJiwr Magnesium Sej.enate in Convergent 
IVjEARisEi) Light. 
