178 PROFESSOR H. B. DIXON ON THE RATE OF EXPLOSION IN GASES. 
In 1888-90 these experiments were repeated. The numbers which follow are all 
the means of pairs of measurements with the connections of the chronograph 
reversed :— 
Series E. 
Series F. 
Series G. 
In 9 mm. tube. 
In 6^ mm. tube. 
In 6| mm. tube. 
2852 
2795 
■ 2827 
2814 
2781 
2840 
2825 
2814 
2803 
2825 
2807 
2836 
2830 
2828 
2799 
2826 
Most of the experiments given in these three series, E, F, and G, were control 
experiments interpolated in other series to check the working of the whole apparatus. 
In the following series the mixture was fired alternately in a straight tube and in 
the same tube coiled on a drum. Each number is the mean of a pair of measurements 
with connections reversed :— 
