598 Mr Lamplough, On the determination of the rate of 
Temperature 0°. 
c.c. 
minutes 
c.c. 
minutes 
0 
0-03 
7 
2-17 
1 
0-31 
8 
2-58 
2 
0-54 
9 
2-98 
3 
0-81 
10 
3-41 
4 
1-09 
11 
3-82 
5 
1-45 
12 
4-24 
6 
1-82 
12-25 
end-point 
Fig. 6. 
The curves in Fig. 6 represent the course of the evolution of 
gas in the above experiments. It will be observed that the rate 
with which the 12-25 c.c. of gas are given off in experiment B 
is the same as that with which the last 12"25 c.c. in experiment A 
are evolved. This fact is perhaps more clearly shown in Fig. 7, 
where the rates of evolution of gas in the two experiments are 
given in terms of the volume of gas which has been evolved, and 
it will be seen that the curve representing the rates of evolution 
in experiment B could be superposed on the latter part of the curve 
for experiment A so as to coincide almost exactly with it. 
If on the curve A in Fig. 6 the point P represents the evolu- 
tion of 11 7 5 c.c. of gas, then after the time represented by this 
point there wag an evolution of 12’25 c.c. of gas, the amount given 
