in Explosions of Coal-pas and Air. 



321 



through each sq. cm. of the grid — that is, the heat in the 

 grid together with that which has passed into the linoleum 

 backing as calculated by means of the expression given 

 above. The data from which these curves have been drawn 

 are given in Table I. It will be noticed that at the moment 



Fig. 2. 



£j 1200 

 I 



? 40 



.|S -4 



b 



^ n 





z~> 





















/ 







* T 















/ 







V 













/ 











^^r 











J 











/ 



s 











y 





















0-15 0-2 0-25 0-3 



Ti'r^a after /gni'tion — Sees. 



OS 



Curves showing Heat in Silver Grid per sq. cm. (S) and total Heat-loss 

 by Conduction per sq. cm. of Wall-surface (C) in a 12'4 per cent, 

 mixture of Coal-eras and Air. 



Table I. — Heat-loss by Conduction in a 12*4 per cent, 

 mixture of Coal-o-as and Air. 







Rise of 



Heat in 



polished 



Silver Grid 





Total Loss 



Time 



after 



Ignition 



Mean 



Gas 



Temp. 



Temp, of 

 polished 



Silver 



Percentage 



Loss to 

 Linoleum 



of Heat by 

 Conduction 

 per sq. cm. 



(sees.). 



(° C. abs.). 



Grid 



(°C). 



(Calories.) 



Backing. 



of surface. 

 (Calories.) 



008 



2050 

 (max.temp.) 



121 



0143 



18-5 



0-17 



o-i 



2030 



145 



171 



20-5 



021 



015 



11)20 



250 



0-295 



30-0 



38 



02 



1800 



315 



0-372 



44-0 



053 



0-25 



1700 



. 36-5 



043 



55 



0-67 



0-3 



1610 



400 



0472 



63-0 



0-77 



04 



1460 



440 



052 



78-5 



0-93 



05 



1330 



465 



0-548 



91-5 



105 



