Mifcettanea Curioja. 95 



fliould fink lower in that Extream; and then 

 the Northerly Winds bringing the condcns'd 

 and ponderous Air from the Neighbourhood of 

 the Pole, and that again being check'd by a 

 Southerly Wind, at no great diftance, and fb 

 heaped, muft of neceffity make the Mercury in fach 

 cafe ftand higher in the other Extream. 



.8 And Laftly, Vtfy near the Equinoctial, as 

 at Barbadoes and St, Helena, there is very little 

 or no Variation of the height of the Barometer ? 

 This Remark, above all others, confirms the 

 Hypothefis of the variable Winds, being thecaufe 

 of thefe Variations of the height of the Mercury j 

 for in the Places above-named, there is always an 

 eafie Gale of Wind blowing nearly upon the fame 

 Point, vi%. E. N. E at Barhadoes^ and E. S. E. 

 at St. Helena j fb that there being no contrary Cur- 

 rents of the Air, to exhauft or accumulate ir, 

 the Atmofphere continues much in the fame State ? 

 However, upon Hurricanes, the moft violent of 

 Storms, the Mercury has been obferv'd very low, 

 but this is but for once in two or three Years, 

 and it foon recovers its fettled ftate of about 29! 

 Inches. I doubt not but the fame thing is in the 

 Eaft Coaft of Africa, and in India, where the 

 Monfoons or Trade- Winds are for half the Year 

 one way, and half the Year another ; only it's 

 probable, that there may fomething worth noting 

 happen, about the times of the change or Ihifting 

 of the Winds, which might be obtain'd, if any 

 Body had the Curiofity to keep the Barometer at 

 our Factories in India. 



I doubt not but this Doctrine will find feme 

 Oppofers, and that one principal Objection will f 

 be, that I fuppofe the Air fbmetimes to move 

 from thofe Parts where it is already evacuated 



below 



