It is a common observation, that persons in good health have about 75 pulsations at the wrist in a minute, consequently in 75 pulsations sound flies about 13 land miles, or 11¹⁄₇ sea miles, which is about 1 land mile in 6 pulsations, and 1 sea mile in 7 pulses, or a league in 20 pulses.
The velocity of sound does not very much vary, whether it goes with the wind or against it. As sound moves vastly swifter than the wind, the acceleration it can thereby receive can be but inconsiderable; and the chief effect we can perceive from the wind is, that the sound will be carried to a greater distance by it. Sound will be louder in proportion to the condension of the air. Water is one of the greatest conductors of sound; it can be heard nearly twice as far as on land.
SOUND, (Sonde, Fr.) An instrument used by surgeons in probing.
To SOUND. To betoken or direct by a sound; as to sound the retreat. Hence
SOUNDINGS. Signals made by any kind of instruments.
Trumpet Soundings, practised by cavalry regiments, viz. for duty.
1. Revillé.
2. Stable call. For stable duties.
| 3. Boots and saddles. | - | |
| 4. To horse. |
When to turn out on horseback for a march, exercise, or other duty.