Prof. Magnus on the Propagation of Heat in Gases. 101 



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



Blackened tube. 



Unbiackened tube. 





Position 









1 Position 







No. 



of equi- 





served 



Differ- 



! of equi- 

 No. | librium Mean. 



served 



Differ- 









deflec- 



ence. 



of the 





ence. 





needle. 





tion. 





! needle. 



tion. 





Protoxide of nitrogen under 1 atm. pressure. 



Vila 



-f-0-5 

 0-2 



+035 



15«2 



14-85 



Vila 



00 



+0-5 



+0-7 



0-7 



0-7 



+025 



60-0 



59-75 





0-0 

 00 

 0-0 



01 



15-2 



151 





+0-6 



60-2 



59-6 





00 



15-2 



152 





+0-7 



60-5 



58-8 





00 



15-2 



152 





+0-7 



60-7 



60-0 







151 

 15-4 



Mean 

 Corres 





59-5 



Corres 



Jonding to ... 



)onding to ... 



2170 



VII : Vllfl= 1M : 154= 100 : 9005 



VII :VIIa=245: 217 = 100: 88 57 



Atmospheric air under 1 atm. pressure. 



VIII 





 

 



+0-2 

 +0-5 







22-5 



22-5 



VIII 



+0-75 



+ 10 



10 



1-2 



1-2 



0-85 



65-2 



64-35 









22-7 



22-7 





10 



65-2 



642 





+0-1 



230 



22-8 





11 



65-2 



641 





+035 



230 



22-65 





1-2 



65-5 



64-3 



Mean 227 



Mean 642 



Corresponding to ... 29-0 



Corresponding to ...326 



Marsh-gas under 1 atm. pressure. 



Villa 





 

 +0-2 

 05 

 0-5 







225 



22*5 



Villa 



+ 10 

 1-5 

 1-5 

 17 

 1-5 



+ 1-25 



640 



62-75 





+0-1 



225 



22-4 





1-5 



64-5 



63 





0-35 



227 



22-35 





1-6 



64-5 



629 





0-5 



227 



22-2 





1-6 



64-7 



631 



Mean 2235 



Mean 62-95 



Corresponding to ... 28 5 



Corresponding to ... 293-0 



VIII :VlIIa=290: 285 = 100: 9827 



VIII : VIIIa=326 : 293 = 100 : 8987 



Atmospheric air under 1 atm. pressure. 



IX 





 

 

 

 







180 



180 



IX 



+0-5 

 0-7 

 0-7 

 05 

 07 



+0-6 



62-5 



61-9 









18-2 



182 





0-7 



630 



623 









18-2 



18-2 





0-7 



62-7 



620 









18-2 



18-2 





06 



630 



62-4 







1815 

 210 







62 15 





Corres 



ponding to ... 





Corres 



ponding to ... 



2730 



