In another passage, seeking for a power capable of exciting the action of the organism, he says: "The lower animal forms, without nervous system, live only by the aid of excitations which they receive from without.
"The Mechanism of Life"
Stéphane Leduc
He writes: "What would vegetable life be without excitations from without, what would be the life even of the lower animals without this cause?"
"The Mechanism of Life"
Stéphane Leduc
The rest of the class have before them only the frightful spectacle of the reactions of a mutilated, suffering animal under excitations which are made in the very depths of a wound on organs which they do not see.
"The Pros and Cons of Vivisection"
Charles Richet Commentator: W. D. Halliburton