Table of Propositions

The text begins mid-list, continuing from a previous page regarding the nature of sound production.
...unless several very slow movements produce great sounds. 3.
III. To determine whether Sound is the movement of the external air, or the internal air which is within the bodies that produce the sound: and if sound can be made without the movement of one or the other. 6.
IV. To determine if sound can be made in a universal or particular vacuum. 8. A "particular vacuum" refers to a localized space devoid of air, a major topic of debate in 17th-century physics.
V. To explain how the air moves when its movement produces sound, and which movements produce no sound at all. 9.
VI. Sounds have the same ratio among themselves as the movements of the air by which they are produced. 11.
VII. To explain how low and high-pitched sounds are made, and what makes them loud or weak. 12.
See the 16th Proposition of the book on the Voice, where I speak more amply of this.
VIII. Sound is not communicated in an instant, as light does, throughout its entire extent, but in a space of time. 14. Note that it is necessary to correct everything said about the speed of sound in this Proposition, following what is in the 9th Proposition of the Usefulness of Harmony. The author frequently updated his data on the speed of sound based on new experiments.
IX. Sound does not depend as much on the bodies by which it is produced as light depends on the illuminating body. 16.
X. To explain in what way sound is more subtle than light, and if it reflects. 18.
XI. Sound represents the size and other qualities of the bodies by which it is produced. 19.
XII. To determine in what proportion sounds diminish from the place where they are produced until they cease entirely. 20.
XIII. To determine if sound is faster than the movement of the bodies by which it is produced. 22.
XIV. To determine if sound passes through diaphanous diaphanous: transparent or translucent and opaque bodies, and how it is aided or hindered by all kinds of bodies. 24.
XV. The sphere of the extent of sound is greater the louder it is, although two or more sounds are not heard twice or several times as far as one of them. 25.
XVI. To determine if sounds have all kinds of dimensions, namely length, width, and depth, and what the other properties or circumstances of sound are. 28.
XVII. To determine why one hears better by night than by day; and if one can know how much more rare meaning less dense hot air is than cold, and by how much it is rarer than water. 30.
XVIII. To determine why one hears sounds from outside a room better when one is inside, than those from inside when one is outside. 33.
XIX. To determine if sound is heard better from bottom to top than from top to bottom. 33.
XX. Sounds hinder one another when they meet. 34.
XXI. Sounds can serve to measure the earth, and to make known news of what is happening throughout the world in a short time. 36. See the ninth Proposition of the Usefulness of Harmony.
XXII. One can use the sounds of each musical instrument, and the different movements given to them, to discourse on all kinds of subjects and to teach the sciences. 39.
XXIII. The force of sounds is multiplied by Rhythmic movements, and by the quality of the bodies and the strikes by which they are produced. 41.