mi V. V. BEVAN ON THE COMBINATION OF HYDKOGEN 
1)2 
0 IQO ^00 300 400 500 600 700 800 900 
Fig. 8. Abscissas, contraction from the time of cutting oil light. 
Ordinates, time in seconds after cutting off light. 
40 80 120 160 40 80 120 160 
