264 



Scientific Proceedings, Royal Dublin Society. 



July, 1922. 



Branches of Sambucus nigra and of Tilia americana were subjected to 

 pressures up to 15 atmospheres. Prom 1 to 3 c.c. of liquid was obtained 

 from each branch; but when boiled with Benedict's solution this liquid, 

 whether inverted with hydrochloric acid or not, showed complete absence of 

 sugars. Some of the branches were kept in the dark for 24 hours before the 

 experiment, but this did not affect the result. 



September, 1922. 



Branches of Tilia americana were again subjected to pressure. The liquid 

 obtained gave a very slight reduction with Benedict's solution. The amount 

 of reduction was not increased by previous inversion of the sample with 

 hydrochloric acid. 



