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Science  09 Nov 1917:
Vol. 46, Issue 1193, pp. 462-464
DOI: 10.1126/science.46.1193.462-a


When Laminaria is exposed to the action of anesthetics (in sufficient concentration to produce any result) there is an increase in respiration. This may be followed by a decrease if the reagent is sufficiently toxic. No decrease is observed with low concentrations which are not toxic.

These facts contradict the theory of Verworn that anesthesia is a kind of asphyxia, for his view is based upon the assumption that anesthetics decrease respiration.