554 Drs. J. T. Bottomley and J. C. Beattie on 



Fig. 4. -Curves showing emission of heat from Pt 3 (bright) and Pt 4 

 (sooted), from the same hank of wire, diameter 0025 centim., at 

 various temperatures. 



105 





























P*. 



% Jun 



9/74 



7 



































1 



/ ^ 



































/ 



































t 



/ 





eo 



75 



70 



55 § 





























J 







5 8> 



1 



























/ 































































*/ 











60 

 55 



<U (J) 



s 

































S3 «: 

 M 



5 % 



»3P 





















/ 













H 



r 35 

 I* 





















t 















1-5 



r l 



















/ 



















«3 



1 

















/ 



o 



>/*, 



June 



16. 









55 



11 



<< 



3 

















/ 



/ 















*1 



8 















/ 



/ 





















< 



* 













> 



/ 





















Is 















/7 



/ 









Pc^o 



une t 



66/17 







15 















^ 



/ 











,s 



^ 



t> 



^Jl 



nezo, 













/ 



z 































V 



> 



V 





























































C 



5 



K 



X) k 



50 2C 



O & 



W A 



w * 



<0 4i 



70 <£ 



o & 



90 36 



O 6L 



16 6. 



50 71 



JO 7i 



50 6t 



00 850 



Temperature in degrees Centigrade. 



