t = 4 
that plants may live along whilé 
without this free communication. 
Befides, water plants, as perficaria 
urens, becabynga, and others, which 
I have employed in my experiments, 
are often found a leng while quite 
covered by the. Mater. in W hich they 
BEAN oe 
By ediees.: a ane plant (the 
po remaining in its own earth) 
in-an.inverted jar full of water, you 
only furprize nature upon the fa& 
in the middle of its operation, by’ 
communication 
ie ieee feud 
ee or +5 any ait of he Plant 
under water; but any air may freely 
come out of it. 
Without covering the leaves or 
the plant entirely with water, its — 
jnpatiie to know: what quantity 
of 
et 
