On the Cephaloscope, and Its Uses in the Discrimination of the Normal and Abnormal Sounds in the Organ of Hearing: With Remarks on the Diseases in Which It Is Applicable
On the Cephaloscope, and Its Uses in the Discrimination of the Normal and Abnormal Sounds in the Organ of Hearing: With Remarks on the Diseases in Which It Is Applicable
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1842 Excerpt: ... recollect a simple and well-known fact in acoustics, and fancied at the same time that it might be turned to some use on the present occasion. The fact I allude to is the augmented impression of sound when conveyed through certain solid bodies; as when we hear the scratch of a pin at one end of a piece of wood, on ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1842 Excerpt: ... recollect a simple and well-known fact in acoustics, and fancied at the same time that it might be turned to some use on the present occasion. The fact I allude to is the augmented impression of sound when conveyed through certain solid bodies; as when we hear the scratch of a pin at one end of a piece of wood, on applying the ear to the other. Immediately on this suggestion, I rolled a quire of paper into a kind of cylinder, and applied one end of it to the region of the heart, and the other to my ear, and was not a little surprised and pleased to find that I could thereby perceive the action of the heart in a manner much more clear and distinct than I had ever been able to do by the immediate application of the ear. From this moment, I imagined that the circumstance might furnish means for enabling us to ascertain the character, not only of the action of the heart, but of every species of sound produced by the motion of all the thoracic viscera, and consequently for the exploration of the respiration, the voice, the rattle, and perhaps even That of immediate auscultation. the fluctuation of fluid extravasated in the pleura or pericardium. With this conviction, I forthwith commenced at the Hospital Necker a series of observations, which have been continued to the present time. The consequence is, that I have been enabled to discover a set of new signs of diseases of the chest, for the most part certain, simple, and prominent, and calculated, perhaps, to render the diagnosis of the diseases of the lungs, heart, and pleura as decided and circumstantial as the indications furnished to the surgeon by the introduction of the finger, or sound, in the complaints wherein these are used. "The first instrument which I used was a cylinder of paper, formed of th...
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