[BoYLE] TEMPERATURE AND VELOCITY OF GAS CURRENT 103 


ele 
J e 
It follows from (6) that EE = — 
1 ipa 
e7@ 
7 1 
and therefore, log > = —s (u, — U) : —. 
Ve q 
Lo vf 1 
Similarly, log 43 = —s (uy — W) . —. 
1 qd 
From Fig. 7, we can obtain the ratios _ and = for any speed. Plotting 
1 1 
1 
the logarithms of these ratios on a base of reciprocal of speed, or Fa , we 
should get straight lines with slopes proportional to (uw, — u;) ana 
(us — w) respectively. The curves, fig. 8, show these slopes to be 0.269 
and 0.995. 
Us — U “995 
H 3 Ter 
Ais Us ay “269 
If we take the actual volumes of the charcoal as proportional to their 
weights, we have 
Et we O80) mn Re OMS B08 
Up — Uy 1-61 — ‘31 1-30 
The disagreement is about 12 per cent. 

= 3-7. 

TABLE 4. 
EMANATION THROUGH CHARCOAL TUBE TO TESTING VESSEL. 






TUBE C. TUBE B. TUBE G. 
Wt. Char. 5.86 gms. Length} Wt. Char. 5.86gms. Length} Wt. Char. 5.86 gms. Length 
har. space, 2 cms. Char. space, 8.0 cms. Char. space, 31.5 cms. 
Dia., 2.47 cms. | Dia., 1.2 cms. Dia., 0.6 cms 
Ionization Ionization | Ionization 
Flow in Current) Flow in Current | Flow in eee 
ec/sec. | x 436.5x 10 Be Ree ARCs D Wu CCIBCE: | Asp te 
for amps. for amps. for amps. 
Nat. Leak 2.86 Nat. Leak 2.72 Nat. Leak 1.90 
.33 5.01 .40 3.41 .61 4.36 
.45 5.37 AT 4.85 1.08 30.6 
91 25.8 72 7, 1.15 33.1 
.95 31.0 .96 22.2 1.39 47.0 
1.00 32.9 1.66 58 3 1.64 59.2 
1.41 56.2 1.76 67.3 1.88 69.0 
2.00 78.6 1.88 70.9 1.93 yet 
2.13 85.5 Nat. Leak 2.84 2.14 81.4 
Nat. Leak PEU MM RECENT AE 2.20 83.0 
sid aby! UPR esti AOL ER AE EE NE Nat. Leak 2.40 

