1915] 



on Gaseous Explosions 



280^ 



This is in agreement with Clerk's experiments just referred to on the 

 gas engine. A similar reduction, but in a less marked proportion,, 

 occurs Avith a 15 per cent mixture, as shown in Fig. 18. It will be 

 noticed the acceleration, when the fan is runnins^ at 2300 revolutions. 



ME in SECONDS 



;Fig. 18. — 15 Per Cent Mixtures. 

 A. Fan at 3600 E.P.M. B. Fan at rest. 



•2 -3 



TIME, IN SECONDS. 



Fig. 19. — 10 Per Cent Mixtures. 



A. Fan at rest 



B. Fan at 2300 E.P.M. 



C. Fan at 3600 E.P.M. 



D. Fan at 4500 E.P.M. 



per minute, is almost as great as when it is running at twice that 

 speed ; and from this it may be inferred that a very moderate 

 amount of movement may have a very great effect upon the time of 

 explosion. The copper temperature curves in Figs. 18 and 19 show 



