on Mixtures of Alcohol and Water. 9 



through the membrane as before. The interval o£ time 

 between placing the cell in alcohol and the commencement 

 of the fall of pressure will be greater than that in the 

 ordinary experiments. 



The results given in Tables V. and VI. show this very clearly. 



Table V. 

 Cell XVI.— Solution of Ethyl Alcohol : 25 c.c. o£ alcohol in 

 100 c.c. solution. 

 Cell in water till the gauge-reading was constant (after 

 3 days). 







Gauge 







Time. 



Readings. 





Cell in water. 



Friday 5.0 



389 



Maximum. 



Cell dried and placed in 









alcohol without opening. 



5-2 



389-2 



The small rise due to I 





5.7 



3891 



handling the cell \ 





5.17 



389 



during the drying. 





For every 5 min. 









until 6.12 



389 







7.55 



389 







9.0 



3S8 







Saturday 10.30 



376 







Monday 8.50 



307 







11.15 



296-8 





Placed in water without 









opening. 



12.30 



290-3 







5.15 



268 



Temporary fall. 





Tuesday 10.0 



324 \ 

 open 221 I 



Permanent rise. 



Cell XXIII. 



Table VI. 

 •Solution of Propyl Alcohol 

 in 100 c.c. of solution. 



20 c.c. of alcohol 





Time. 



Gauge Eeadings. 





Cell in water. 



Tuesday 10.0 



open 256 









closed 382 



Pressure added by 





1.15 



419 



[pump. 





Wednesday 10.0 



465 







3.20 



465 



Maximum. 



Placed in propyl 









alcohol. 



3.25 



465 







3.30 



464-1 







3.40 



464-1 







Every 10 min. 









until 4.30 



463-9 







9.0 



459 







Thursday 9.30 



3536 







10.0 



347 



Permanent fall. 



