Electrolytes on Copper Colloidal Solutions. 593 



Table X. 



Relation between the number of negative ions added 



per cc. to the copper colloidal solutions and the 



resulting velocities of the particles. 



Solution. 



Normality : 

 gram-mols per cc. 



Numbers proportional 



to the number of 

 ions per cc. : Graui- 



ions/cc. 



Telocity 

 at 18° O. 



KCl 1. 











+24-9X10" 5 



2. 



17-OxlO -6 



17-OxlO" 6 



+ 25-7X10"' 5 



3. 



38-0x10"° 



38-0x10"° 



+26-2 X10" 5 



4. 



74-OxlO" 6 



740x10"° 



+228 xlO" 5 



5, 



154-0x10"° 



154-0xl6"° 



+ 18-7X10" 5 



- - 



K 2 S0 4 1. 











+ 25-4X10" 5 



o 



7-7x10-° 



7-7x10"° 



+25-3X10" 5 



3. 



192x10"° 



19-2x10"° 



+240X10" 5 



4. 



38-4 X 10 ~ 6 



38-4x10-° 



4-21-8 XlO" 5 



5. 



960x10-° 



96-0x10"° 



+ 14-4X10" 5 



6. 



1530x10-° 



1530x10-° 



4- 0-OxlO" 5 



A1 2 (S0 4 ) 3 ... 1. 











+ 234x10-5 



2. 



4-6x10-° 



13-8x10-° 



+ 21-5X10- 5 



3. 



9-2x10-° 



270x10-° 



+ 192x10-5 



4. 



18-3x10-° 



54-9x10"° 



+ 18-5x10-5 



K 3 P0 4 1. 











+ 254 XlO"' 5 



2 # 



3-6xl0~° 



3-6xl0" 6 



+21-5X10" 5 



3. 



7-2x10"° 



7-2XHT 6 



+ 16SX10" 5 



4. 



14-4x10-° 



14-4x10"° 



+ 3-4X10" 5 



5. 



21-6x10-° 



21-6x10-° 



- 4-8 XlO" 5 



6. 



32-8XMT 6 



32-8x10-° 



- 7-OxlO" 5 



K G (FeCy 6 ) 2 ...l. 











+30-4x10-5 



2 - 



3-55X10 -6 



7-lxlO" 6 



+ 14-0X10" 5 



^ 



7-15x10"° 



14-3xl0~ 6 



+ 3-8X10" 5 



4> i 



10-7X10" 6 



21-4X10" 6 



+ roxio" 5 



_ 1 



0. 



14-3x10-° 



286X10" 6 



- 1-5X10" 5 



6.| 



21'4xl0~ 6 



42-SxlO" 6 



- 9-lxlO" 5 ' 



Phil. Mag. S. 6. Vol. 17. No. 100. April 1909. 2 8 



