Larynx
2 of the 7 encyclopedias on this shelf carry an entry for Larynx. Both are reproduced below, so you can see where they agree and where they differ.
Aiton's Encyclopedia (1910)
a cartilaginous box placed between the windpipe and the tongue, and inclosing membranous bands--the vocal cords. All air taken into or sent out of the lungs must pass through this box; and it is the vibrations of the elastic bands in this box that produce voice. In ordinary breathing the vocal cords are separated so that when the air passes through them no sound is produced. In talking, singing, or shouting, the cords are drawn inward and backward by the cartilage--muscles--so that a very narrow slit is formed, and the air, in passing, is forced out. This sets the edges of the bands in vibration, and the vibrations produce sound. The loudness of the sound made depends upon the force with which the air is driven between the cords. The pitch of the sound depends upon the tension of the cords. If these are stretched, the pitch is high; if relaxed, the pitch is low. The quality of the voice--whether harsh or sweet--depends upon several conditions, such as the form and condition of the throat, nose, and mouth cavities, and the general health of the body. Articulate speech is the result of changes in the resonance cavities, mouth, throat, and nose, and in the modifications produced in the voice by the lips, tongue, and teeth. The larynx of a child is smaller proportionately than that of an adult. At the age of twelve to fifteen years the larynx widens and the cords lengthen. This change causes a deepening of the tone of the voice. Clearness and quality of voice can be improved by practice. See Adam'S Apple
Collier's New Encyclopedia (1921)
the windpipe. It is built up of the cricoid cartilage above the trachea, containing the arytenoid cartilages and vocal ligaments, terminating in the glottis and epiglottis; it is the organ of voice. After many and Rouen, France, Nov. 22, 1643. Settling in Canada at the age of 23, he began his travels with an attempt to reach China by descending the Ohio river, which he supposed to empty into the Pacific. As soon as he found that the great S. streams drained into the Gulf of Mexico he formed the project of descending the Mississippi to the sea . severe hardships this long voyage was concluded, and the arms of France set up at the mouth of the great river on April 9, 1682. Two years later an expedition was fitted out to establish a permanent French settlement on the Gulf, which should secure France's claims to the Mississippi valley. But La Salle's bad fortune pursued him; he mistook Matagorda Bay for a mouth of the Mississippi, landed there, and then spent two years in unsuccessful journeys to discover the great river, while his colonists and soldiers gradually dwindled away. His harshness of manner , more than his want of success, embittered his followers , and he was assassinated by some of them March 20, 1687.