539 



CHAR XXIV, 



SMELL. 



" 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 circumstances. For this reason they have 

 been generally classed together under the name of chemical or 

 subjective senses* 



" By smell we perceive odorous effluvia received by inspiration 

 and applied principally to that part of the Schneiderian* mem- 

 brane which invests both sides of the septum narium and the 

 convexities of the turbinated bones. 



" Although the same moist membrane lines the nostrils b and 

 their sinuses , its nature appears different 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. 



" On the septum and the turbinated bones it is fungous and 

 abounds in mucous cryptae. 



" In the frontal, sphenoidal, ethmoidal, and maxillary sinuses, 

 it is extremely delicate, and supplied with an infinite number of 

 blood-vessels which exhale an aqueous dew. 



* Conr. Viet. Schneider, De Osse Cribriformi 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." 



b " Sommerring, Icones Organorum Mumanorum Olfacttis. Francof. 1810. 

 fol." 



c " Haller, Icones Anat. fasc. iv. tab. ii. 



Duverney, (Euvres Anatom. vol. i. tab. xiv. 



Santorini, Tab. Posthum. iv. 



C J. M. Langenbeck, $kw Bibl. for Ckirurgte, vol. ii. P. u. p. 318. 

 tab. ii." 



