156 



PROCEEDINGS OP SECTION B. 



surface D-D, and pass through the hole C, thus maintaining the 

 column of liquid E in a state of equilibrium with its own vapour. An 

 improved form of ebbulioscope is shown 

 on the second sketch. 



Into the boiling tube A there slides 

 a somewhat narrower tube B, which has 

 a narrower tube C sealed into it. The 

 tube C is drawn out at its lower end as 

 shown. The joining of B and -C is one 

 of the easiest of joints known to the 

 glass-blower. 



It will at once be seen that the 

 column of liquid between A and B 

 forms an efficient seal, and that all 

 steam when the liquid is boiling will 

 pass from the steam chamber between 

 B and C through the column of liquid 

 •in C. The liquid boils over at the top of 

 C. Using boracic acid as a test sub- 

 stance, the following results were 

 obtained : — Calculated molecular weight, 

 63; with 20 cc. water found 68, 65; 

 15 cc. water found 67, 64, 64, 66. 



Results with mannite and other 

 organic substances were equally satis- 

 factory. 



No details of measurements of the 

 apparatus described have been given, 

 because experiments are still in progress 

 to determine the minimum size which 

 will give satisfactory values. 



12.— OLEOXE, THE KETONE FROM OLEIC ACID. 



By Prof. T. H. EASTERFIELD and Miss C. M. TAYLOR. M.A. 



[Abstract.] 



The most usual method for the preparation of ketones of the type 

 CnH2nO is the distillation of the calcium or barium salts of the 

 corresponding acid. But, with the one exception mentioned below, I 

 have been unable to find any reference to the application of this 

 method to the preparation of unsaturated ketones of the type 

 CnHon— 40. Vide Beilstein, Edition III., p. 1006; Beilstein Supple 

 ment — (literature to June, 190D) ; Journal of Chem. Soc, Index, 1883- 

 1892; Journal of Chem. Soc, Index, 1892; Journal of Chem. Soc, 

 yearly Indexes to 1907. 



In the old edition of Watts' Dictionary of Chemistry, Vol. IV., 

 p. 193, the statement is made that "oleic acid distilled with lime 

 gives an oily liquid which is regarded by Bussy as the acetone of 

 oleic acid. It has not, however, been obtained pure." 



