this medium* The solution was filtered fron inaoluhle tar. 

 A portion of the yellow filtrate gave a reddish yellow pre- 

 cipitate with lead acetate. The alcoholic solution was distil- 

 led in an Anschutze flask under diminished pressure; a yellow 

 liquid condensed In the arm of the flask while most of the 

 alcohol was collected in a bottle connected with the arm. The 

 yellow liquid was acid to litmus. Water was added, the solu- 

 tion was shaken out with ether and the ether was evaporated. 

 When the small residue was completely dry it' was a yellow solid 

 soluble in dilute alcohol and acid to litmus. The substance 

 was not volatile enough to justify the use of this method for 

 getting it. 



Chlorophyll could not be removed from the original sub- 

 stance because the solvents for Chlorophyll such as alcohol, 

 ether, fats, petroleum, and carbon bisulphide dissolve large 

 quantities of the mixture. 



A precipitate obtained by adding lead acetate to a filtered 

 solution of the original substabce in 50';^ alcohol was suspended 

 in water, decomposed by hydrogen sulphide, shaken out with 

 ether and the ether evaporated. The residue appeared at first 

 to be a yellow oil, but on complete evaporation of the ether 

 in a desiccator, a yellow solid was obtained apparently the 

 same as that obtained by vacuum distillation. 



A solution of the original material in 50/o alcohol was 



filtered through bone-black and the filtrate was colorless. 



Examination showed that everything had been removed by the 

 -80- 



