PROFESSOR H. B. DIXON ON THE RATE OP EXPLOSION IN GASES. 177 
Part IV .—The Rates of Explosion as Measmxd. 
(1.) Hydrogen and Oxygen under Ordinary Temperature and Pressure. 
The rate of explosion of the mixture Hg + 0 was measured in a tube 9 mm. in 
diameter and 55 metres long. 
Rates Found. 
Series A. 
Metres per sec. 
2804 
2812 
2835 
! Mean 2817 
In a tube of same diameter and 100 metres loug ;— 
Series B. 
2822 
2847 
2795 
2821 
In a tube 13 mm. diameter and 100 metres long :— 
Series C. 
2805 
2840 
2831 
2800 
2819 
MDCCCXCIIl.—A. 
2 A 
