On the respiratory functions of the nose : and their relation to certain pathological conditions / by Greville MacDonald.

  • Greville MacDonald
Date:
1889
Catalogue details

Licence: Public Domain Mark

Credit: On the respiratory functions of the nose : and their relation to certain pathological conditions / by Greville MacDonald. Source: Wellcome Collection.

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    which is once more attached to a tube con- veying the air into the mouth. The act of inspiration through the mouthpiece neces- sarily draws air out at one nostril, in at the
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