37° BOTANICAL GAZETTE [MAY 
running 12-15 hours. The absorption tubes were inserted by 
making the connection at ZL with heavy rubber tubing; 125 cc. 
x 
J 
=i 
Pigs t. 
am 
of the approximately 0.1 normal barium hydroxide solution was 
then run into the large bulb, and the connection made at E with a 
