188 PHYSIOLOGY. 



in several instances." There can be no doubt, I think, that 

 this peculiarity is referable to delicacy of smell. Dr. Dung- 

 lison states, that a gentleman, blind from birth, had an 

 extraordinary antipathy to cats. One day in company, he 

 suddenly leaped up, got upon an elevated seat, and exclaim- 

 ed, that there was a cat in the room, and begged them to 

 remove it. It was in vain that the company assured him 

 that he was mistaken. He persisted in his assertion and in 

 his state of agitation ; when, on opening the door of a small 

 closet in the room, it was found that a cat had been acci- 

 dentally shut up in it. ! 



Questions. Define the sense of smell. Where is it seated ? De- 

 scribe the pituitary membrane ; the nose. What cavities are concern- 

 ed in the sense of smell ? What is the object of such an extended sur- 

 face ? How many bones assist in forming the cavities of the nostrils ? 

 Why are they supplied with muscles ? Does the membrane that line 

 the nostrils resemble the other mucous membrane ? How is it moist- 

 ened? Do the tears answer any purpose except washing the eye? 

 What effect has snuff-taking on the sense of smell ? What is the 

 nerve of smell ? What other nerves send twigs to the nose ; their func- 

 tion ? To what does Majendie compare the organ of smell ? What 

 is odour ? How given off from bodies ? Are odours easily described ? 

 What facts show that their particles are very minute ? What is the 

 art of perfumery ? Do odours differ as to the permanence of the im- 

 pression they produce ? What favours the diffusion of odours ? Can 

 odours be conveyed through water or other fluids ? Have fishes any 

 organ of smell ? What facts prove this ? What article renders bait 

 attractive to fish ? Were odours ever believed to be nutritious ? What 

 anecdotes in relation to this ? Are the senses of smell and taste asso- 

 ciated ? What is the use of smell? Are any substances disagreeable 

 to the smell and agreeable tp the taste ? Is smell more useful to ani- 

 mals than man ? Is it infallible in them ? What fact proves that it 

 is not ? What singular custom prevails among shepherds ? What 

 animals have the sense of smell the most acute ? How is the smell of 

 the hog employed in France ? What is said of this sense in the grey- 

 hound ? Was it ever employed to hunt savages ? When and where ? 

 Have birds any organ of smell ? What does Humboldt say of the 

 condor ? What experiments did Audabon try, to prove that birds of 



