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fee a great agitation roand about the place where it 

 iell J but the more the waves retire from the center of 

 motion, the flower and the lefs fenfible they grow • 

 and as fuch motions do not laft long in wattr, no 

 more do they in the air, for the fame rcafon . 

 Though there may be unufual ftorms of Wind any 

 where, the air and vapours are drawn together there- 

 about by contrary Winds, yet they are more frequent 

 about the Caribbee iflands, efpecially in June and 

 Augult, when the fun is vertical there, for their air be- 

 ing rarefied by the fun's heat, the ufual Winds bring 

 thither a vaft quantity of air and vapours, which be- 

 ing crouded together, in the gulf of America, caufe 

 a great eftuation about the neighbouring iflands. .: ■ 

 When the fun is on this fide the equator, the an- is 

 n»ore rarefied thereabouts," and it may fo happen, that 

 the fouth-fouth-eaft W;nd, which conftantly blows 

 beyond the line, may fometimes tranfgrefs its limits, 

 and bring the vapours of the iEthiopic fea to the fame 

 place where thofc of the Atlantic are already gather- 

 ed ; which, being kept in by the (hore of America, 

 muft neceflarily be driven about the Caribbee iflands. 



Gf ihe Qualities' i)f Winds . 



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A- ' - - ' * I 



Wind that blows from the fea is always moift ; 

 Sn fummer it is cold, in winter warm, uriiefs the fea 

 be frozen up. This is well demonftrated thus: there 

 is vapour continually rifing out of all Water (as ap- 

 pears even hence, that'^a quantity of water, being 

 left a little while in an open veflel, is found fenfibly 

 diminifhed,^ but efpecially if it be expofed to the 

 fun's rays, ih which cafe the evaporation is beyond 

 all expedation. ■ By this meahs the air incumbent oh 

 the fea becomes impregnated with a deal of vapour, 

 but the Winds, blowing from off the fea, fweep thefe 



vapours along with ttem, and confequently are always 

 hioift. 



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Again, Mtef in fummer, tct. conceives kfs heat 

 than terreftrial bodies, expofed to the fame rays of 

 the fun 5 but in winter, fea water is warmer than the 

 earth, covered with froft, liiow, &c. Wherefore, as 

 the air, contiguous to any body, is found to partake 

 of its heat and cold ; the air, contiguous to fea wa- 

 ter, will be warmer in winter, and colder in fummer, 

 than that contiguous to the earth: or thus^ vapours 

 raifed from Water by the Urn's warmtK in wfnter, are 

 wanner than the air they rife in, as appears from the 

 vapours condenfing, and become vifible, almoft as 

 foon as they are eot out into the air. FreJh Quantities 

 of vapours therefore, continually warming the atmo- 

 fphere OVer the (ca, will raife its heat beyond that 

 over the land* ; ;. , ' ', ^' 



Again, the fun^s rays reflefted from the earth into the 

 air in fummer, are much more than tliofe from the 

 water into the air. The air therefore Over the earth, 

 warmed by the refleftion of more rays than that over 

 water, is warmer. Hence fea Winds make cloudy 

 hazy weather. - . — 



2. Winds which blow from the continent are always 

 dry, in fummer warm, and cold in winter; for there 

 is much lefs vapour arifing from the earth, 'than fix)m 

 water, and therefore the air over the continent will be 

 impregnated with much fewer vapours': add, that the 

 vapours or exhalations raifed by a great degree of 

 heat out of the earth, are much finer and lefs fenfible 

 than thofe from water. The Wind therefore, blow- 

 ing over the continent, carries but little vapour with 

 it, and is therefore dry. 



Our northern and fouthern Winds, however, which 

 are commonly efteemed the caufes of cold and warm 

 weather. Dr. Derham obfcrves (as we have faid,) are 

 really the efFcfts of the cold or warmth of the atmo- 

 fphere : hence it is, that we frequently Tee a warm 

 foutherly Wind on a fudden changed to the north, 

 by the fall of fnow or hail, and that in a cold frofty 

 morning we fee the Wind m)rth, which afterward 

 wheels about toward the foutherly quarters, when the 



evening furnS northerly or cafterly. 

 SomeWmds are drying, others are moin: j fomega-" 

 ther clouds, others difperfe them; fome are warm^ 

 others cold, but their influefite is not one and the'fame 

 in all places, for fuch Winds as are warm in one coun- 

 try are cdld in ahotHei* ; thofe that are wet with us 

 are diy with other nations, and Oh the contrary. 

 The dry Winds are fuch as carry but a few vapours 

 along with them/and therefofe lick bff the'moift par- ■ 

 tides from the bodies over which ttjeypafs ; and thus 

 in Holland the north and eaftWindsj with the inter- 

 mediate points, are drying, becaufe the c'otd northern 

 fea yields but few vapours m comparifon of thofe that 

 come from warmer parts of the'oceail, but the wefter- 

 ly Winds and others are moift, becaufe they iffue from 

 warm and vaporous parts, the weftern Wind feldom 

 failing to fend rain, ■ :\ " 



Such Winds gather clouds, which blow from' the 

 quarters where the vapours arife, which, in conjunc-^ 

 tion with the vapours of our own region, fill the air j ' 

 and, on the contrary, thofe that bring little vapours 

 along with them, and bear away that which hangs 

 over us, bring fair weathen 



Winds are cither warm or cold, as the countries are 

 from whence they blow ^ and therefore when a brifk 

 wind blows from a cold quarter, it allays the heat of 

 fummer, which is very troublefome in ftill weather. 

 Thus a quick blall of a pair of bellows will put out a 



■ flame, which a gcnde blowing increales 5, for the quick 

 blaft drives all the flame tO one fide, where it is ftifled 

 by the force of the incumben| air for wint of aliment 

 but a gentle wind augments the motion of the flame 

 every way, and makes it fci^e on more par^s'of fuel. 



' Now, becaufe all the heat or cold of Wind proceeds 

 from the heat or cold of the country where it blows, 

 therefore the fame Winds are cold or hot every where. 

 Beyond the line they are ju{t the reverfe of what they 



, are with us -, their cold Winds are from tfie fouth, 

 ours from the north ; and as pur fouth Winds are 

 warm^ frorn no other realbn, but becaufe they bring 

 Us an air heated by the fun, for the very fame reafon 

 the north Winds are warm to our antipodes. 

 From what has been faid, it is evident, that the fun' 



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The Winds, Mr. Pointer fays, are the caufes of the 

 moft fudden and extraordinary alterations of the air. 

 The nature of the Winds are fuch, that by the expe- 

 rience we have of them, we may yerj nearly prefliit 

 What weather we Ihall have for two or three days af- 

 ter ; as for example, we know that, in our climate, 

 a fouth Wind generally brings rain, and a weft "VVind 



and a weft Wind is the predominant Wind 

 With us, becaufe thcoccan lies on the vJtft fide of our 

 country. , - ^-\ " > , 



And alfo, that a north Wind brines fair weather to 

 us, as well as the eaft Wind, which does not laft fo 

 long as the north j therefore the north-eaft and fouth- 

 Weft Winds are thofe that are neceflary chiefly to be 

 treated of ' * ^ . / '., 



Mr. Pointer gives the following rules to know when 

 the Wind will fet in one of thefe tWo points, for the 

 moft part, for two or three months together, Firft, as 

 to the north-eaft Wind ; when the Wind turns to the 

 nbrth-ealf point, and continues in it twO days without 

 rain, and does neither turn to the fouthward the third 

 day, nor rain, then it is likely to continue eight or nine 

 d'ays without rain, and then t^ return into the fouth. 

 If this Wind turns out of the Ibuth to the north-eaft 

 again, and condnucs two days in that point without 

 rain, and neither rains nor turns to the fouth the 

 third day, it is likely to continue north-eaft' for two 

 months, and for the moft part for three months. The 

 Wind will finifh thefe turns toward the' north in thVee 



weeks time. 



- Secondly, 



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