164 C. E. FAWSITT AND C. K. FISCHER. 



of B dissolved in A will affect the properties of the A layer 

 and in particular the molecular volume of A, so that the 

 position of a liquid in regard to miscibility depends not 

 only on its molecular volume and other properties, but on 

 the way these are altered by introduction of the other 

 liquid with which the miscibility is being examined. At 

 the same time the influence of the solution of small amounts 

 of other substances does not usually seem to be so very 

 disturbing. 



The following list contains a considerable number of 

 liquids arranged in order. 



It may be taken as a rule that if any one of these, say- 

 methyl alcohol No. 7, mixes perfectly with any other, say 

 castor oil, No. 46, then all the liquids between Nos. 7 and 

 47 will mix perfectly. No. 9 mixes with all liquids up to 

 No. 51, therefore all liquids between these will mix per- 

 fectly. It is interesting to note that while Nos. 13 and 15, 

 dichlorhydrine and methyl acetate, are only partially 

 miscible with water (No. 1), and partially miscible with 

 No. 55 (liquid petrolatum) pyridine is miscible with No. 1 

 and No. 55. 



The experiments were carried out at a room temperature 

 of 18° -22° O, and most of liquids used were Kahlbaum's 

 (pre-war stock). 



1 Water 



11 Propyl alcohol 



2 Glycerol 



12 Propionic acid 



3 Glycol 



13 Dichlorhydrine (C 3 H 6 Cl 2 ) 



4 Formamide 



14 Pyridine 



5 Formic acid 



15 Methyl acetate 



6 Diethyl tartrate 



16 Methylal 



7 Methyl alcohol 



17 Methyl ethyl ketone 



8 Acetic acid 



18 Diethyl acetal |C 2 H 4 (OEt) a l 



9 Ethyl alcohol 



19 Isobutyl alcohol 



10 Acetone 



20 Bromal 



