They are due to the inhalation of the scent, which has all
the properties of the aromatic aldehydes, and include skin eruptions,[81]
general excitement, sleeplessness, headache, excessive menstruation, and
irritable bladder. There is nearly always sexual excitement, which may be
very pronounced.[82]
We are here in the presence, it may be insisted, not of a nervous
influence only, but of a direct effect of odor on the vital processes. The
experiments of Tardif on the influence of perfumes on frogs and rabbits
showed that a poisonous effect was exerted;[83] while Fere, by incubating
fowls' eggs in the presence of musk, found repeatedly that many
abnormalities occurred, and that development was retarded even in the
embryos that remained normal; while he obtained somewhat similar results
by using essences of lavender, cloves, etc.[84] The influence of odors is
thus deeper than is indicated by their nervous effects; they act directly
on nutrition. We are led, as Passy remarks, to regard odors as very
intimately related to the physiological properties of organic substances,
and the sense of smell as a detached fragment of generally sensibility,
reacting to the same stimuli as general sensibility, but highly
specialized in view of its protective function.
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