The sense of Smell is closely connected with the sense of Taste, and often acts in connection therewith, as the tiny particles of the substance in the mouth arise to the organs of Smell, by means of the opening or means of communication situated in the back part of the mouth.
Besides which the nose usually detects the odor of substances before they enter the mouth. The sense of Smell operates by reason of the tiny particles or the object being carried to the mucous membrane of the interior of the nose, by means of the air. The membrane, being moist, seizes and holds these particles for a moment, and the fine nervous organism reports differences and qualities and the Mind is thus informed of the nature of the object.
The sense of Smell is very highly developed among animals, who are compelled to rely upon it to a considerable extent. And many occupations among men require the development of this sense, for instance, the tobacconist, the wine dealer, the perfumers, the chemist, etc. It is related that in the cases of certain blind people, it has been observed that they could distinguish persons in this manner.