98 Prof. Magnus on the Propagation of Heat in Gases. 

 Transmission of the Heat of a Gas-flame (continued) . 



Blackened tube. 



Unblackened tube. 



No. 



Position 

 of equi- 

 librium I Mean, 

 of the 

 needle. 



Ob- 

 served 

 deflec- 

 tion. 



Differ- 

 ence. 



No. 



Position 

 of equi- 

 librium 

 of the 

 needle. 



Mean. 



Ob- 

 served 

 deflec- 

 tion. 



Differ- 

 ence. 



Atmospheric air under 4 millims. pressure. 



la 



+ 0*5 0-50 

 0-5 | °- 50 



13-5 

 13-2 

 13-5 

 13-5 



13-25 

 130 

 130 

 13-0 



la 



+" 5 1 +6-5 



05 0-5 



0-5 



0-5 U5 



64-5 

 64-5 

 64-5 

 64-5 



64-0 

 64-0 

 640 

 64 



Mean 13-0 



Corresponding to 13-0 



I : Ia = 1267: 130=100: 10260 



Mean 640 



Corresponding to 320-0 



I :Ia = 273: 320 = 100: 11721 



Atmospheric air under 1 atm. pressure. 



n 



-0-5 

 00 

 -0-2 

 -10 

 -10 



-0-25 

 -01 

 -0-6 

 -1-0 



12-5 

 12-7 

 122 

 120 



12-75 

 12-8 

 12-8 

 13-0 



II 



+ ' 5 +0-5 

 +0-5 +1° 



+ 07 0-85 



+10 1U 



610 

 610 

 61-2 

 61-5 



605 

 60-4 

 60-35 

 60-5 







12-8 

 12-8 



Mean 6045 



Corresponding to ... 236-9 



Corres 



ponding to 



Atmospheric air under 6 millims. pres. 



Atmospheric air under 8 millims. pre3. 



II a 



00 

 -0-25 

 -0-25 

 -0-5 

 -0-5 



-0-1 

 -0-25 

 -0-3 

 -05 



130 

 12-75 

 12-75 

 12-5 



131 

 130 

 131 

 13-0 



r ila 



+0-2 

 05 

 0-5 

 0-5 

 0-5 



+0-35 

 0-5 

 0-5 

 0-5 



62-7 

 62-7 

 62-7 

 63-0 



62-35 

 62-2 

 62-2 

 62-5 



Mean 131 



Corresponding to ... 13*1 

 II: II a = 12-8: 131-100:102-3 



Mean 

 Corres; 

 H:IIa = 23 





62-3 



jonding to ... 

 5:277 = 100:1 



277-0 

 17-37 



Atmospheric air under 1 atm. pressure. 



Ill* 



00 



00 



+0-5 



+0-5 

 -f0-5 



00 



-f-0-25 



0-5 



05 



110 

 11-2 

 11-5 

 11-5 



11-0 

 110 

 110 

 110 



III 



+2-0 

 10 

 10 

 1-5 

 1-5 



+1-5 

 10 

 1-25 

 1-5 



59-5 

 590 

 59-25 

 59-5 



580 

 58-0 

 58-0 

 58-0 



Mean 110 







58-0 





Corres 



jonding 



to 



110 





Corres] 



>onding to ... 



1930 



* In this determination a greater resistance was introduced in the con 

 necting wire of the thermo-pile. 



