100 



THE EXPLOSIVE WAVE. 



Distance of interrupters. 



40-109 metres 

 29-982 * 



Mixture (H 2 + 0). 



Velocity. 



2810 

 /2692\ 

 \2716/ 



Mean. 



2704 



Distance of interrupters. 

 Metres. 



40-059 ... 

 29982 1 ... 

 20-092 2 . 



Mixture (CO + 0). 



Velocity. 



Metres. 



1096 

 1140 

 1187 



Metres. 



1068 

 1121 

 1183 



Metres. 



1104 



Mean. 



Metres. 



1089 

 1130 

 1185 



Again with the glass tube 1*5 mms. in diameter 

 Mixture (H 2 + 0). 



Distance of interrupters. 



43-340 metres 3 

 20-944 



Velocity. 



2341 metres. 

 2433 



In all these measurements, the differences between the 

 velocities measured with unequal lengths do not exceed the 

 limits of error. 



Pressure. The pressure was varied in the ratio of about 

 1 to 3. The caoutchouc tube (40*054 metres long) was employed, 

 and with three different gaseous mixtures. 



Mixture (H 2 + 0). 



Pressure (expressed by the height 

 of a column of mercury). 



0-560 metre 

 0-760 

 1-260 

 1-580 



Velocity. 



2763 metres. 

 2800 

 2776 

 2744 



Mixture (CO + 0). 



Pressure. 



0-570 metre 

 0-760 

 0-854 



1-560 



Velocity. 



1120 metres. 

 1089 

 1072 



/1140\ 



\1124J 



1152 



1 A section of tubing 13 metres long filled with the same compound was 

 afterwards added on ; i.e. the interrupter was placed in the path of the flame, 

 and not at the extremity of the tube. 



2 The interrupter was placed half-way along the tube, in the path of the 

 flame. 



3 This time the interrupter was placed at the end of the tube. 



