8o Studios of Diffusion through Rubber Membranes [Sept. 

 II. SUMMARY OF DIFFUSION DATA {continued) 



Inside 



Solvent 



7 Ether. 



8 Ether . . . 



9 Ether. . . 



10 Ether . . . 



11 Alcohol. . 



12 Chloro- 



form . . . 



13 Alcohol . . 



14 Ethyl 

 acetate . . 



15 Acetone.. 



16 Gl. acetic 



acid .... 



17 Ether. . . 



18 Ether. . . 



19 Ethyl 

 acetate . . 



30 Acetone.. 

 21 Alcohol. . 

 27 Ether. . . 



23 Ether. . . 



24 Ether . . . 



25 Ether. 



Pigment 



26 Ether . . 



27 Ether. . 



28 Ether. . 



29 Ether. . 



30 Ether . . 



31 Ether. . 



32 Ether. . 



33 Ether. . 



34 Ether . . 



35 Ether. . 



36 Ethyl 

 acetate . 



37 Ethyl 

 acetate . 



Sudan III 



Sudan III 



Sudan III 



Sudan III 



Sudan III 



Sudan III 



Sudan III 



Sudan III 



Sudan III 



Sudan III 



Picric acid 



Hematoxylin 



Methyl violet 



Methyl violet 



Methyl violet 



Methyl violet 



Magenta 



Naphthol yellow . . . 



Methyl violet and 



Sudan III 



Outside solvent 



Methyl alco- 

 hol 



Acetone . 



Petroleum 



ether. . . . 

 Gl. acetic acid 

 Ether 



Chloroform . 

 Alcohol . . . . 



Ethyl acetate 

 Acetone .... 



Gl. acetic acid 

 Ether 



Ether 



Ethyl acetate 



Acetone . 

 Alcohol . 

 Ether. . . 

 Ether. . . 

 Ether... 



Resnlt 



Ether. 



Chlorophyll Ether. 



Annatto 



Alcannin 



Metanil yellow. . 

 Martius yellow. . 



Scarlet R 



Malachite green. 

 Brazil wood . . . . 



Chrysoldin 



Turmeric 



'Ether. 

 Ether. 

 Ether. 

 Ether. 

 Ether. 

 Ether. 

 Ether. 

 Ether. 

 Ether. 



Annatto . 



Chlorophyl . 



Ethyl acetate 



Ethyl acetate 



Di 



Di 



Di 

 Di 

 Di 



Di 

 Di 



Di 

 Di 



Di 

 Di 



D3 



DS 



D6 



O 



D5 



Ds 



O 



Di 



Di 

 Di 

 Di 

 O 

 Di 

 Di 



D2 



Di 



D2 



Di 



D2 



Di 



Remarks 



Ether was withdrawn, leaving 



layer of dye inside. 

 Ether withdrawn. Solution of 



pigment in bag concentrated. 



Moderate diffusion. 

 Diffusion slow. 



Rapid diffusion. 

 Diffusion slow. 



Slow diffusion. 

 Moderate diffusion. 



Slow diffusion. 



Rubber yellow; color not re- 

 moved by ether. 



Denser Solution in bag than 

 outside. (See 36.) 



Rapid diffusion of the Sudan 

 III. Ether changed three 

 times in 2 hours after which 

 practically all Sudan III had 

 been removed, leaving the 

 methyl violet in the bag. 



Vary slight diffusion. 



Very slight diffusion. 



Very rapid diffusion. 



Rapid diffusion. 

 Very rapid diffusion. 

 Bag colored green. 

 Slow diffusion. 

 Very slow diffusion. 

 Rapid diffusion. 



Pigment Solution inside concen- 

 trated.« 



Pigment Solution inside concen- 

 trated. 



• " Fat-soluble " chlorophyl was used in all the chlorophyl tests. 



* In these cases (36-44) the solvent diffused more rapidly than the solute. 



