If it begin to Rain from the South, with a high Wind for two or three Hours, and the Wind falls, but the Rain continues, it is like to rain twelve Hours or more, and does usually rain till a strong North Wind clears the Air. These long Rains seldom hold above twelve Hours, or happen above once a Year.
THIS depends entirely upon Observation, and Experience shews us that whenever the Wind falls, Rain follows. It has been likewise observed, that when the Wind changes often there fall heavy Rains. All these Alterations in the Atmosphere, are less observed by Men than by Animals, for two Reasons. The first is, that we live much within Doors, by which they are less obvious to us, and it is for this Reason that the Husbandman, Seamen, Fishermen, but above all Shepherds, who are more in the open Air than other Men, are better acquainted with, and more able to distinguish and judge of the Signs of the Alteration of the Weather, than those who live altogether within Doors, or go out but seldom. Another Reason is our having so many Things to mind, which takes off our Thoughts, and renders us less attentive to the Signals which would give up Notice of such Alterations. It is for this Reason that we ought to serve ourselves of that Sort of Instinct which Nature has given to other Animals, and which as it is a Gift of Nature, is in a Manner infallible.
THUS if small Birds prune themselves and duck and make a shew of washing. If Crows make a great Noise in the Evening, if Geese gaggle more than usual, these are all Signs of Rain, because these Animals love wet Weather, and rejoice at the approach of it. On the other Hand, if Oxen lie on their Right Sides, look towards the South, and lick their Hoofs, if Cows look up in the Air, and snuff it, if Asses bray violently, and if Cocks crow at unusual Hours, but especially when a Hen and Chickens crowd into the House, these are sure Signs of Rain.
INSECTS also are very sensible of such Changes of Weather. Frogs croak more than ordinary, Worms creep out of the Ground, Moles throw up more Earth than usual, because such Weather is more agreeable to them; Hornets, Wasps, and Gnats, sting more frequently against wet Weather than in fair. Spiders are restless and uneasy, and frequently drop from the Wall, the humid Air getting into their Webs and making them heavy. But the surest and most certain Sign is taken from Bees, which are more incommoded by Rain than almost any other Creatures, and therefore, as soon as the Air begins to grow heavy, and the Vapours to condense, they will not fly from their Hives, but either remain in them all Day, or else fly but to a small Distance.
XXIII.
If it begins to rain an Hour or two before Sun-rising, it is like to be fair before Noon, and so continue that Day, but if the Rain begin an Hour or two after Sun-rising, it is like to Rain all that Day, except the Rainbow be seen before it rains.
THIS is a short, clear, and easy Observation, and therefore I shall not dwell long upon it, but rather entertain the Reader with a few Observations on the Rainbow. Whenever it appears, things are thus circumstanced. The Spectator has the Sun behind him, and Clouds with the Bow in them before him. Sometimes there are two and even three Bows seen, but this is very rare. The Colours in the Bow are ranged in this Order, viz. Violet, Purple, Blue, Green, Yellow, Orange, Red. After a long Drought the Bow is a certain Sign of Rain, if after much Wet fair Weather. If the Green be large and bright it is a Sign of Rain, but if the Red be the strongest Colour, then it denotes Wind and Rain together. If the Bow breaks up all at once there will follow serene and settled Weather. If the Bow be seen in the Morning small Rain will follow. If at Noon, settled and heavy Rains; if at Night, fair Weather. The Appearance of two or three Rainbows shews fair Weather for the present, but settled and heavy Rains in two or three Days' Time.
LUNAR Rainbows are sometimes, but very seldom seen, they are extremely beautiful, but much less than those that appear in the Day time, and a yellow, or rather a straw Colour prevails most. As they happen so seldom, they cannot well be reckoned amongst the Signs of Weather. But now, after speaking of so many different Methods of judging when rainy Weather will be of a short or long Continuance: Give me leave to describe two or three Instruments easily made, which will shew the Alterations of the Weather certainly, constantly, and early enough for most Uses.
THERE were some Years ago a Sort of Toys sold, with a Man and a Woman so fixed before the Door of a House, that at the Approach of wet Weather the Woman entered it, and when the Weather grew fair the Man. This was done by the Help of a Bit of Catgut, which shrinks in wet Weather, and stretches again when it is fair. This appears better by a Line and Plummet, especially if the Line be made of good Whipcord, that is well dried, for then if it be hung against a Wainscot, and a Line drawn under it exactly where the Plummet reaches, in very moderate Weather it will be found to rise above it before Rain, and to sink below when the Weather is like to become fair; but the best Instrument of all is a good Pair of Scales, in one of which let there be a brass Weight of a Pound, and in the other a Pound of Salt, or of Salt-Petre well dried, a Stand being placed under the Scale, so as to hinder its falling too low. When it is inclined to rain the Salt will swell, and sink the Scale, when the Weather is growing fair, the brass Weight will regain its Ascendancy.
XXIV.