[ 158 ] 



SECT. XV. 



OF SMELL. 



240. WHILE taste and smell are closely related by 

 the proximity of their organs, they are not less so by 

 the analogy of their stimuli and by some other circum- 

 stances. For this reason, they have been generally 

 named chemical or subjective senses. 



By smell we perceive odorous effluvia received by 

 inspiration and applied principally to that part of the 

 Schneiderian * membrane which invests both sides of 

 the septum narium and the convexities of the turbinated 

 bones. 



241. Although the same mucous membrane lines the 

 nostrils f and their sinuses, $ its nature appears diffe- 

 rent in different parts. 



Near the external openings it is more similar to the 

 skin, and beset with sebaceous follicles from which 

 arise hairs known by the name of vibrissae. 



* Conr. Viet. Schneider, De Osse Cribrifonni et Sensu ac Organo Odoratus. 

 Witteb. 1655. 12mo. 



This classical work forms an epoch in physiological history, not only because 

 it was the first accurate treatise on the function of smell, but because it put an 

 end to the visionary doctrine of the organ of smell being the emunctory of the 

 brain. 



f Sommerring, leones Organorum Humanorwm Olfactus. Francof. 

 1810. fol. 



+ Haller, Icones Anat. fasc. iv.' tab. ii. 



Duverney, CEuvres Anatom. Vol. i. tab. xiv. 



Santorini, Tab. Post hum. iv. 



