Mr Barloiv, On the Osmotic Pressure of Aqueous Solutions. 239 



With the fresh water present, the level of the gauge rose 

 through 46 mm. in six days, new water being placed outside on 

 the fourth day. On the sixth day, after the second water was 

 added, there were signs of falling, showing that the impurity of the 

 outer water was beginning to have its effect. 



Conclusion. 



) 



Hence, the general conclusion to which the experiments of 

 this paper point is, that, owing to the impurities received by the 

 outer water from the clay of the pot and the air, the osmotic 

 properties of very dilute aqueous solutions cannot be measured 

 directly by this method, and as formerly we shall have to depend 

 (at least for the present) on freezing-point and boiling-point 

 methods. 



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