Dialogue

 1 1|   sends forth no sound. The air, therefore, must be thought
 2 1|     motion is raised in the air, we perceive a sound greater
 3 1|    lesser, according to the air’s motion; but without some
 4 1|  without some motion in the air, we never hear any sound
 5 1|   motion is produced in the air, yet I do not see how you
 6 1|  the sound itself is in the air.~HYL. It is this very motion
 7 1| very motion in the external air that produces in the mind
 8 1|     sensation, exist in the air, if by the AIR you mean
 9 1| exist in the air, if by the AIR you mean a senseless substance
10 1|    or undulatory motion the air.~PHIL. I thought I had already
11 1|     a certain motion of the air?~PHIL. It seems then there
12 1|    I act too in drawing the air through my nose; because
13 3|  from the resistance of the air) descend with an equal velocity;