The precipitates were filtered off and examined. The first 

 was small in amount, gummy and hard to filter. The solution 

 was shaken with ether after each precipitate had "been filter- 

 ed off. The succeeding precipitates were in hetter condi- 

 tion but were not pure. All appeared to he impure gallic 

 acid which had become brown by absorption of oxygen. They 

 were saved however to be tested for poison. After the last 

 fraction had separated, the filtrate waa shaken several times 

 with ether and saved for further examination, which will be 

 described under "Bhamnose". This filtrate is designated as 

 B. 



At this stage of the work a portion of the resin obtained 

 from lead precipitate A was tested and found to be not poison- 

 ous as already moitioned. By this test, all the substfn as 

 contained in the lead precipitate A after its extraction with 

 ether in the Soxhlet apparatus, were eliminated from the 

 possible poisonous substances. The poison must therefore 

 have been extracted by the ether. 



A fresh portion of the original poisonous material was 

 treated with 50?S alcohol and filtered from insoluble tar. 

 The filtrate was precipitated in six fractions by lead ace- 

 tate. The last fractions were lighter in color and apparent- 

 ly much purer than the first. The cixth lead precipitate 

 was decomposed by Hydrogen sulphide, the li^t-yellow water 

 solution was tested and found to be not poisonous. It gave 

 -27- 



