
[BOYLE] TEMPERATURE AND VELOCITY OF GAS CURRENT 99 
Fig. 7, table 3, shows the effect of different quantities of an absorb- 
ing substance, viz.:—cocoanut charcoal. Curve I, fig. 7, is a repetition 
of curve III, fig. 5, which is the case of a non-absorbing substance. 
Curves II, III, IV, fig. 7, are the 1-q curves, taken under the same 
experimental conditions as I, representing the cases of tubes of the same 
diameter, 6 mm., containing 31, 1:61 and 5-86 gms. of cocoanut charcoal, 
180 
160 
1/40 
420 
ANS 
IONIZATION CURRENT, x #36:5x 1/0 FOR AMPS, 
4090 
40 

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FLOW IN CC PER 8EC. 
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respectively. It will be noticed that the values of i, are less, and 
the maximum values of i, the further to the right along the q-axis, the 
greater the quantity of charcoal. The maxima of I and II are of about 
the same value; probably this is on account of the fact that the tube 
