Sound flies 1142 feet in one second.
Flamestead.
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.
Hutton.
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 condensation of the air. Water is one of the greatest conductors of sound: it can be heard nearly twice as far as on land.
Hutton.
STOPPAGES.—There shall be stopped out of the pay of an artillery soldier, (beer money included,) the sum of 5 shillings and one penny per week, to be applied towards the expense of his mess, (including vegetables, &c.) A sum not exceeding one shilling and six-pence per week shall be retained for necessaries to be accounted for, as usual, monthly. The remainder amounting to 3s. 10¾d. per week, shall be paid to the soldier, subject to the accustomed deductions for washing, &c. or articles for cleaning his cloaths and appointments. Stoppages for rations for man and horse. See the word [Ration].
T angent—See the table of natural tangents at the end of the word [Gunnery].
Tangent Scale.—.21 of an inch is the tangent of 1 degree to every foot of a gun’s length, from the base ring to the swell of the muzzle: Therefore if the distance in feet, between these two points be multiplied by .21, the product will be the tangent of 1 degree; from which the dispart being subtracted, will give the length of the tangent scale above the base ring for one degree of elevation for that particular gun. If the scale is to be applied to the quarter sight of the gun, of course the dispart need not be subtracted.
Tangent of 1 Degree to the following Ordnance.