410 
Proceedings of the Royal Society of Edinburgh. [Sess. 
Uranium Glass — Second Specimen. 
This piece measured 2x1x1 cms. and was from Schott u. Gen., Jena, 
the trade name for it being F 3757. The fluorescence was decidedly 
stronger than in the case of the other specimen. The following table 
gives the fraction of the incident light transmitted through 1 cm. of 
the glass, the loss from reflection being included : — 
A 
A 
600 
•929 
484 fi/i 
•321 
562 
•914 
467 
•277 
530 
•903 
452 
•131 
504 
•494 
