[ 297 1 
I have made many animals fuffer ex¬ 
treme pain, with a view to watch the 
changes the faliva would undergo. By 
laying fome of this faliva on a wound in 
another animal, I could never produce the 
hydrophobia, but the wound has taken on 
fuch a character, as to convince me that 
the faliva was of a poifonous quality. 
Fifties, by nature harmlefs, when very 
much irritated, have feparated a faliva 
which has proved mortal. (Diarium Eru- 
ditorum virorum Francof. An. 1612.) 
The power the nerves have over the 
fecretions being admitted, we cannot but 
acknowledge the exigence of a fluid in 
them, which muft be extremely fubtle, 
and extremely rapid in its motion, to 
put in adtion machines of fo fine and 
delicate a texture, and to be able, iSht 
eculiy to change the fecretions in fuch a 
way as to create a poifon. 
Can we avoid being aware of the qua¬ 
lities of electricity in this fluid ? 
Plants, 
