6 Mr. P. S. Barlow : Osmotic Experiments 



Table III. 



Cell XXIY. — The cell was first soaked in methyl alcohol. 

 The solution consisted of 49 c.c. of methyl alcohol made 

 up to 50 c.c. with water: i.e., nearly 24 molecules of 

 alcohol to 1 of water. 





Time. Gauge Readings 





Cell in methyl alcohol 



Monday 5.0 open 126*4 

 closed 126-9 







5.17 122-4 



Immediate per- 





5.55 120 



[manent fall. 





Tuesday 11.30 101 -6] 

 open 125 J 









Placed in water. 









4.32 126 



1 Temporary fall. 





4.38 124-8 





5.0 123-9 



J 



5.46 126 





6.22 130 



[rise. 



Wednesday a.m. , 250 



Permanent normal 



Table IV. 



Cell XII. — In this case the solution was outside the cell and 

 and alcohol inside. 

 Solution of ethyl alcohol: 60 grs, alcohol in 100 c.c. 

 solution. 





Time Gauge 

 Readings. 



Cell standing in 

 the solution. 



Thursday 12.20 

 4.35 

 Friday 10.0 

 Saturday 11.45 

 Monday 10.40 

 Tuesday 10.0' 

 Wednesday 10.20 



289 

 292-6 

 305-5 

 323 

 354 

 361 



373 Shows permanent rise and 

 inflow from the solution. 



After the above experiment, the alcohol was withdrawn 

 and the cell was filled with water. This would give a weak 

 solution of alcohol (but not very weak, owing to small 

 capacity of cell) inside. During- the next 24 hours there was 

 a large decrease in the internal pressure, indicating a current 

 from the weaker to the stronger solution. 



