200 



the apparatus requires uo further attention uutil the combustion is ended. 



If the inflow of combustible gases much exceeds the rate prescribed, 

 a series of small explosions is likely to occur at the juncture of the capil- 

 lary side-arm with the pipette, traces of carbon deposition are evident and 

 the results are slightly low. 



Some analyses of acetylene and explosive mixtures of acetylene with 

 air are appended : 



Exp. Xo. 



C2H2, cc. 



H2, cc. 



O2, cc. 



Res. cc. 



After 

 EOH cc. 



CO2, cc. 



O2 Con- 

 sumed, ce. 



C2H2. %. 



20.0 



30.0 



80.0 



10.0 



30.0 



54.2 



2.0 



50.0 



52.6 



30.0 



30.0 



100.0 



30.0 



15.0 



100.0 



15.0 



30.0 



69.0 



15.0 



30.0 



70.0 



10.2 



25.0 



50.9 



55.0 



34.3 

 26.8 

 70.3 

 77.8 

 46.6 

 47 4 

 33.4 



15.0 

 34.2 

 22.8 

 10.8 

 18.4 

 16.6 

 17.4 

 13.0 



40.0 

 20 1 

 4.0 

 59.5 

 59.4 

 30.0 

 30.0 

 20.4 



65.0 

 40.0 

 29.8 

 89.2 

 81.6 

 52.4 

 52.6 

 37.9 



100.0 

 100.5 

 100.0 

 99.2 

 99.0 

 100.0 

 100.0 

 100.0 



Explosive mixtures of air and acetylene : 



15.0 



30.0 



50.6 



35.2 



13.4 



21. S 



15.3 



30.0 



51.0 



34.6 



12.5 



22.1 



72.6 

 72.2 



Absorption by fuming sulphuric acid gave 72.0% and 72.3%. 



Purdue University. 

 Lafayette. Ind. 



