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If we possessed a true, well established and undoubted theory
concerning the function of the nerves in the human body, the
principles of smell would be much easier to understand. So far, we
do not know for certain whether the action of nerves takes place by
means of a subtle fluid, which is instantaneously conveyed from the
beginning of the nerves to their ends, or whether, as some think,
some sort of vibratory movements is produced in them, or whether
the stimulation should be considered as the only sufficient cause,
to say nothing of the new opinion concerning the electrical force.
Linnaeus Although much has been learned since the time of Linnaeus,
it is still true that we do not yet possess "a true, well
established and undoubted" theory of olfaction. The literature of
the subject, however, has long been rather voluminous - the
frequent assertions to the contrary are simply untrue - and is now
growing rapidly. Moreover, quite a number of symposia on olfaction
(or olfaction and taste) have been held during recent years. For
example, in the U. S. A.
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