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Updated: June 20, 2025


It is in connection with the last of these services that we come across some of the most curious observations as to the production and perception of odorous particles. Butterflies and moths and some other insects have olfactory organs in the ends of the antennæ and the "palps" about the mouth.

Hence appears the necessity for attention to ventilation, and especially to prevent the membrane of the nose from being habitually stimulated and debilitated by the effluvia generated in a close and hot kennel. M. Majendie instituted some curious experiments on the sense of smelling, and he was led to believe that it depended more on the fifth pair of nerves than on the olfactory nerve.

One might think that four or five thousand years would exhaust the olfactory qualities of anything; but experience teaches us that these smells remain, and that their secrets are unknown to us. Today they are as much mysteries as they were when the embalmers put the body in the bath of natron... All at once I sat up. I had become lost in an absorbing reverie.

The true fact of the matter is, we can image practically anything that we can sense. We may have tactual images of things touched; auditory images of things heard; gustatory images of things tasted; olfactory images of things smelled. How these behave in general and how they interact in study will engage our attention in this chapter.

Thus the idea of strongly scented effluvia, which are cut off by screens of wood, metal, card, glass, or what not, returns with double force. I have shown that the great nocturnal moth was not thrown off the scent by the powerful odour of naphthaline, which I thought would mask the extra-subtle emanations of the female, which were imperceptible to human olfactory organs.

The nose, which was at first two blind, sensitive pits in the skin of the head, now consists of two nostrils opening into the mouth, with an olfactory nerve spreading richly over the passages. The heart, which was formerly was a mere swelling of a part of one of the blood-vessels, now has two chambers.

This is known as an olfactory illusion and should you be able to create this effect, you can be sure that you are a somnambulistic subject. Here are suggestions you can use: "As I count to three, I shall gradually feel the cool ocean breeze coming over the waves. It will be a very pleasant feeling. One ... I am beginning to feel the cool ocean breeze, especially on my face and hands.

'Facts and Arguments for Darwin, English translat., 1869, p. 20. See the previous discussion on the olfactory threads. Labelled are: a. Part of right anterior antenna of male, forming a prehensile organ. b. Posterior pair of thoracic legs of male. c.

He shuffled along at the very top of his speed, his mouth watering, while the delicious odour of tripe and onions appeared to be borne on the air to his olfactory nerves: so strong is the force of fancy. Arrived at his destination, he found the shop closed. It was Mrs. Jenkins's custom to close at seven from October to April; and the shutters had now just been put up. Mr.

The sensation of smell arises by the passage of a current of air containing odorous matter over the mucous lining of the cavities, and stimulating the olfactory cells of the nerve-endings. Man has all the features which distinguish the olfactory organ of the mammals from that of the lower Vertebrates.

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