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However, one would think, that if he was determined to compare Wind to an Idea or Sensation in the human Mind, he might have thought of one more swift in it's Motions. For though the East Wind is a heavy Wind, and lays very keen Hold of a Sail, as being cold, and therefore more condensed, and moving with greater Moment, on Account of it's Weight; yet I am very much mistaken if we have any East Winds, that travel near so fast as the South-West Winds which we have in March; nay, so far is it from being swift, that when it is set in, we may feel it blow against our Bodies,
with a more steady, slow Motion than any other; and it is reasonable to suppose, that it ought to move slower according to the Rules of Philosophy: For the Barometer shews, that the colder the Air is, the more it weighs; and a heavy Body takes more Time in changing it's Place, by a Force or Cause, than a light one.
However, we will not tax Horace with Impropriety, in so fine an Ode; as we do not know, what the East Winds may be in Italy. They had not the German Ocean to pass over, before they came to Horace, and may be warm, light, and soft, in that Country.
But to return: There are many Things upon the Surface of the Earth, (without being obliged to have Recourse to the extraordinary Velocity of Light) which move faster than the Wind. We have no Occasion to go any further than the Flight of a Pigeon, or a Swallow, even for a Storm; which we may observe, by the Motion of light Bodies, such as
Feathers and Straws, which have no Power to resist it's Force, and must be hurried away with the same Velocity as the Wind itself. We may easily try the Experiment, by throwing Feathers from off a Church Steeple, or any high Place; and we shall find, that though they will be hurried off at a great Rate, yet not so swift as a Pigeon upon her full Stretch. Those who are at Sea have a much better Opportunity of observing it's Motions than Landmen: Nothing is more common, than to see that the Wind has chopped about, by it's Action upon the Sails of a Ship at great Distance off; and it is a long Time before it reaches the Sails of the Ship from whence it is first discovered; and even when a Storm is seen coming at a Distance, they have Time enough to reeve the Sails, and lie in a Posture to receive it. It would be very easy at Land, to take an exact Measure of the Velocity of any Wind, by watching it when it first comes. It might be done in this Manner, viz. by taking the exact Distance of all the Churches in the
Neighbourhood from each other, and setting Flags upon the Steeples of those which stand easy to be seen, and which are in different Directions; after which, a Person might go up to the Top of one which stood in the middle of them, with a Telescope, and as soon as he saw the Flags upon any of the Steeples at a Distance move from the Directions which they stood in when he first ascended the Steeple, he might be certain of a fresh Gale being come, and that it had just then reached that Steeple. Upon seeing this, all that he would have to do would be, to look at his Watch and by that Means he would know how fast the Gale of Wind had travelled, by observing how many Miles it had gone in such a Time. For by observing the Flag on the Steeple at a Distance, he might know when it had reached that Place, and by the Flag upon the Steeple where the Observer himself stood, he might see when it reached him, and by his Watch he might know how long it had been coming.