154 



THE ROYAL SOCIETY OF CANADA 

 Table IV. 



Zeiss specimen. 



(i t -U/,x 



Hl« 



Table V. 



Columns 1-3, Table III and columns 1-2 of Tables IV and V 

 are taken from Dr. Kaye's paper. The other results were obtained 

 by calculation from the formulae given above. 



It will be noticed especially at lower temperatures that the 

 individual results are in fairly good agreement with the mean values. 

 Above 1,000°C, the results are probably too high. 



