I9I2] Jacob Rosenhloom 69 



üble substances, diffuse from ether Solution through rubber 

 membranes into ether, 



2. Sodium Chlorid, lecithans prepared from various sources, 

 kephalin, cuorin, and the Compound of platinum with lecithin, do not 

 diffuse under such conditions. 



3. One or more of the diffusible substances in these experiments 

 may be dialyzed from Solutions containing them, together with one 

 or more of the indiffusible ones, without inducing any of the latter 

 to pass through the membrane. 



