L. G. M. BAAS BECKING AND H. C. HAMPTON 269 
peroxide change the time in the same manner. Figure 4 will illustrate 
this. 
4 cc. of extract react with : 
T 
Time in " mm." peroxide 
(45) 
4 CC. 10- vol. peroxide 45 11. 3 — — 
3 cc. lo-vol. peroxide 34 11.3 
(22) 
2 cc. 10- vol. peroxide 22 11. 
(10) 
I cc. lo-vol. peroxide 10 10 
The times are proportional to the amount of peroxide. 
/ 
/ 
/ 
Fig. 4. Autogram. Effects of different quantities of peroxide. 
To compare these results with the reaction velocities, we used the 
following method: We imagined the assymptote extended to the ordinate 
axis. Then the quantity (a — x) of the formula 
-=c(a-x) 
will be the distance from a given point of the curve to the assymptote. 
We call it D. We can write for a point of the curve P: 
tgap = KpDp, or Kp 
"Dp ' 
ap being the angle between the tangent at the point P and the time axis. 
