264 



Tern- Electric 

 perature. field. 



C. Yolts/cm. 



MR. E. M. WELLISCH ON THE MOBILITIES OF THE 

 Height of fall to 



1st point. 2nd point. 



Time. 



Pressure. 



k. 



&760- 



cm. /sec. cm. /see. cm. /sec. 



ACETON. 



20 



15-5 



38-7 

 19-3 



13-5 

 38-7 



19 3 



15-5 



9-7 



19-3 



55-0 



54-8 



,. c , f positive ion 0-31 cm. /sec. 



Mean values of brm< t 



\ negative 



0-33 

 0-31 

 0-29 



0-32 

 0-38* 



0-30 



0-28 

 0-31 

 0-29 



0-35* 



0-29 



SULPHUR DIOXIDE. 



19 



77-4 



38-7 

 19-3 



116-0 

 77-4 

 38-7 



154-7 

 15-5 



54-8 



55-0 



Mean values of * 



("positive ion 0-44 

 'L negative 0-41 



0-45 



0-43 

 0-44 



0-45 



0-45 

 0-43 



0-42 

 0-43 

 0-47 



0-41 

 0-41 



0-40 

 0-41 



0-43 



0-40 

 0-39 



0-39 

 0-42 



