1885.] when raised to High Incandescence, 223 



Experiment 2. — Carbon Centre (single). 



Filament. 



Shunt. 



Remarks. 



Volts. 



Amperes. 



Calculated 



resistance 



(hot). 



Calculated 

 E.M.F. 



Current in 

 milliamperes. 



Resistance. 









ohms. 



volts. 









80 



0-50 



160-0 











84 



•57 



147-4 





0-98 







88 



•60 



146-7 



5-44 



0-54 



99,000 





92 



•65 



141 -6 



4-76 



1-22 



39,000 





96 



•70 



137 -1 



27-7 



2-20 



12,600 





100 



•74 



135-1 



25 -4 



3-42 



7,420 



Blue tinge appeared. 



104 



•79 



131-7 



214 



4-88 



4,380 



108 



•83 



130-1 



17 5 



7'32 



2,390 





88 



0-60 



146-7 



08-23 



0-46 



179,000 



Reversed the current through 



92 



•65 



141-6 



04-86 



0-93 



52,300 



the filament and repeated 



96 



•70 



137*1 



26-0 



1-76 



14,800 



the experiments. 



100 



•74 



135 1 



21 1 



2 93 



7,190 



Blue tinge appeared. 



104 



•79 



131-7 



19 1 



4-45 



4,300 



108 



•83 



130-1 



17-5 



7 32 



2,390 





Experiment 3. — Iron Centre (single). 



Filament. 



Shunt. 



Remarks. 



Yolts. 



Amperes. 



Calculated 



resistance 



(hot). 



Calculated 

 E.M.F. 



Current in 

 milliamperes. 



Resistance. 







ohms. 



volts. 









80 



0-50 



160-0 











90 



•57 



157-9 











96 



•62 



154-8 





0-25 







100 



•66 



1515 





0-49 







110 



•77 



142 9 



31*4 



2-05 



15,300 





120 



•87 



137 9 



19-8 



5-85 



3,380 



Faint blue. 



90 



0-57 



157 9 





0-09 





Reversed the current through 



100 



•66 



151-5 





0-49 





the filament and repeated 



110 



•77 



142-9 



27 3 



1-95 



14,000 



the experiments. 



120 



•87 



137 9 



20-0 



5-61 



3,560 



Faint blue. 



