Returning home, he placed against the uvula this little piece of glass, which he had heated with warm water and carefully dried. Then with a hand-mirror he flashed on to its surface a ray of sunlight. By good fortune he hit upon the proper angle at the very first attempt. There before his eyes appeared the glottis, wide open and so fully exposed that he could see a portion of the trachea. So dumfounded was he that he sat down aghast for several minutes. On recovering from his amazement he gazed intently for some time at the changes which were presented to his vision while the various tones were being emitted. From what he witnessed it was easy to conclude that his theory, attributing to the glottis alone the power of engendering sound, was confirmed, and thence it followed that the different positions taken by the larynx in the front of the throat had no action whatever in the formation of the sound. At last he tore himself away, and wrote a description of what he had seen. Six months later, on March 22, 1855, his paper, "Physiological Observations on the Human Voice," was submitted to the Royal Society of London. In it was set down the scientific thesis of his discovery in language which would have done credit to expert anatomists and physiologists. On May 24 this was read before the Society by Professor Sharpey at a meeting held under the presidency of Lord Wrottesley, and was duly published in the 'Proceedings of the Royal Society,' vol. vii. Investigation shows that primarily it is an account of the oral cavity and of the physiology of the voice, exemplified by the mechanical contrivance of the author's own thoughtful invention, actually used in an autoscopic manner with the idea of elucidating the action of the larynx during vocal effort. As far as Garcia was concerned, the laryngoscope ceased to be of any special use as soon as his first investigations were concluded. By his examination of the glottis he had had the satisfaction of proving that all his theories with regard to the emission of the voice were absolutely correct. Beyond that, he did not see that anything further was to be gained beyond satisfying the curiosity of those who might be interested to see for themselves the forms and changes which the inside of the larynx assumed during singing and speaking. The method of making scientific use of the voice is due to his discovery and ocular verification of the action of the vocal cords and of the glottis in the emission of sound.