Ounar. IL. 
DROPS OF WATER. 37 
vapours, and oxygen (after the plant has been for some 
time excluded from its action), all induce inflection, 
and this likewise results from an induced galvanic 
current.* 
* My son Francis, guided by 
the observations of Dr. Burdon 
Sanderson on Dionza, finds that 
if two needles are inserted into 
the blade of a leaf of Drosera, the 
tentacles do not move; but that if 
similar needles in connection with 
the secondary coil of a Du Bois 
inductive apparatus are inserted, 
the tentacles curve inwards rn the 
course of a few minutes. My son 
hopes soon to publish an account 
of his observations. 
