orce 



and Osmotic Pressure. 



393 



2nd Series.— Solution (y). Density 1*6049 at 20°*3 : con- 

 centration 12' 33 normal. Amalgam cells. 



gm.-equiv./litre 

 (1000 C). 



logO=-^. 



E.M.F. observed. 



Volts. 



E.M.F. 



from normal. 

 Volts X 10-*. 



y=12'33 

 y/10 

 ylOO 



2091 

 3091 

 +091 



0-9378 

 1-0573 

 1-1298 



+ 1263 

 + 68 

 - 657 



3rd Series. — Solution (y) as before. Amalgam cells. 



1 gm.-equiv./litre 

 (1000 C). 



logC=-^. 



E.M.F. observed. 



Volts. 



E.M.F. 

 from normal. 



Volts x 10- i. 



y=12-33 



•2-091 



0-9382 



+ 1288 



y!2 



3-790 



1 0005 



+ 665 



yii 



3-489 



10300 



+ 370 



y/8 



8-188 



1-0528 



+ 142 



y/16 



4 887 



1-0755 



- 85 



y/80 



4-188 



1-1269 



- 599 



Uh Series.— Solution (z). Density 1-9538 at 20°. Since 

 this density lies beyond the range of the tables, another 

 was prepared from it, by mixing 40 c.c. of (z) with 

 20 c.c. of water. The density of the latter (2/3 z) was 

 1*6624 at 20° : whence the concentration (from the 

 tables) = 13*51 normal, and thence that of the original 

 solution is 19*94 normal. The solution (2/3 z) was 

 diluted similarly to form (4/9 z) : density of the latter 

 1*4536 at 20°, whence concentration 9*089 normal : it 

 was then diluted to (4/90 z) with pipette and flask in the 

 usual way. Amalgam cells. 



Solution. 



logC=-v//. 



E.M.F. observed. 

 Volts. 



E.M.F. 

 from normal. 

 Volts x 10-4. 



z 

 2/3 z 

 4/9 z 

 4/90 



I 000 

 2131 

 3-958 



4-958 



08539 

 0-9246 

 09740 

 1-0683 



+ 2113 

 + 1406 

 + 912 

 - 31 



Phil Mag. S. 6. Vol. 1. No. 4. April 1901 



2 D 



