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The men who had come with their wives had fallen to discussing their own affairs; by the acoustic law before mentioned, every murmur rang in Lucien's ear; he saw all the gaps caused by the spasmodic workings of jaws sympathetically affected, the teeth that seemed to grin defiance at him.
We account for this by the fibres which in the brain connect the optical with the acoustic centre, but just how these fibres bring together not only the sensations, but the centres, we fail to see.
Upon a visit to Salt Lake City nearly a third of a century ago, I attended service in the great Tabernacle when it was filled to overflowing, and yet so excellent were its acoustic arrangements that every word of the speaker and every note of the organ could be heard distinctly. The surroundings were indeed imposing.
The acoustic properties of the river would make an architect die with envy. The light breeze bears one's conversation audibly for half a mile; one hears the splash of a fish that jumps a thousand yards away; and the grim cliffs at the foot of which the canal winds in and out take up the profanity of the towpath and hurl it back and forth across the river as if it was great fun and all propriety.
The auscultory organ of most of the Invertebrates has substantially the same composition. It usually consists of a closed vesicle, filled with fluid, and containing otoliths, with the acoustic nerve expanding on its wall. But, while the auditory vesicle is usually of a simple round or oval shape in the Invertebrates, it has in the Vertebrates a special and curious structure, the labyrinth.
At our first encounter with this problem we remarked that in the supersensible no such sharp distinctions exist between different sense-spheres as are found in body-bound sense-perception. At the same time we remembered that even in physical perception we are inclined to attach acoustic attributes to colours and optical attributes to tones.
A very sonorous bell, placed beside the portress, and which was audible throughout the house, indicated by its varied peals, which formed a sort of acoustic telegraph, all the actions of material life which were to be performed, and summoned to the parlor, in case of need, such or such an inhabitant of the house. Each person and each thing had its own peal.
When we have thus chosen suitable subjects, observation shows from the start sufficiently distinct varieties, different orientations of the imagination depending on intellectual causes, such as the predominance of visual or acoustic or tactile-motor images making for mechanical invention; or dependent on emotional causes, that is, of character, according as the latter is timid, joyous, exuberant, retired, healthy, sickly, etc.
He was an elderly man with thin cheeks and a large nose. He had one of those great, orotund voices that occasionally roll out of little men, and he read the service with a misjudged effort to fill the building. The building happened to have peculiarly fine acoustic properties; but the unfortunate man roared like him of Bashan.
Any one can realize, however, that it did not take so acute and ingenious a mind very long to push forward to the telephone, as a dangerous competitor with Bell, who had also, like Edison, been working assiduously in the field of acoustic and multiple telegraphs. Seen in the retrospect, the struggle for the goal at this moment was one of the memorable incidents in electrical history.
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