538     Mr.  H.  E.  Hurst :  Genesis  of  Ions  by  Collision  and 
Pressure  1  mm. 
d 
•2 
•3 
•4 
X-1050         q  
13 
51 
289 
a  =1268 
13 
50-4 
278 
/3=-0353          
«=-465. 
X«  =  4SS. 
V  =  49I. 
Pressure  *5  mm. 
d  j        -2 
•4 
•6 
•8 
X  =  525           q  
3-64 
13-3 
531 
303 
a  =6-41 
364 
13-3 
52-9 
301 
/3=-0174          
•929. 
Xa=488. 
V=485. 
Pressure  *5  mm. 
d 
•2 
•3 
•4 
•5 
•6 
X-700          q  
3-9 
7-8 
16-6 
37-4 
109-2 
a  =6-74 
3-9 
7-85 
16-5 
37-3 
107 
/3=-06              
a  =  '706. 
Xa=494.  V=497. 
Pressure  *5  mm. 
d 
•2 
•3 
•4 
•5 
X=875 
o  .., 
4-58 
9-63 
23-2 
70-8 
a  =75 
/3  =-079 
w   
4-58 
10-14 
24-2 
71-2 
a=-613.  Xa=537. 
V=530. 
