94- Mifcellanea Curio fa. 



and being accumulated by the oppolition of the 

 Wefterly Wind blowing in the Ocean, the Mer- 

 cury muft needs be preft to a more than ordina- 

 ry height, and as a concurring Caufe, the ftir in Ic- 

 ing of the lower parts of the Air into leffer 

 room by cold, muft needs caufe a defcentof the 

 upper parts of the Atmofphere, to reduce the 

 Cavity made by this contraction* to an Mquili- 

 hrium. 



6. Wliy after 'very great Storms of Windy when 

 the Mercury has been very low, it generally rifes 

 again very faft ? This I have frequently obfer- 

 ved, and once found it rifen an Inch and a half 

 in lefs than fix Hours, after a long continu'd 

 Storm of South- Weft Wind. This feems to be 

 occafion'd by the fudden Acceftion of new Air to 

 fupply the great Evacuation which fuch con- 

 tinu'd Storms make thereof, in thofe places 

 whence they- happen (as in the third Remark) and 

 by the Recoile of the Air, after the ibrce ceafes 

 that impcll d it ; and the Reafbn why the Mercu- 

 ry rifes fo faft, is becaufe the Air being very much 

 rarify'd beyond its mean denfity, the Neighbouring 

 Air runs in the more fwiftly to bring it to an 

 /Equilibration^ as we fee Water runs the fafter 

 for having a great declivity. 



7- Why in more Northerly places the Variations 

 of the Barofcope are greater than in the Southerly ? 

 The truth of the Matter of Fa& is prov'd from 

 Obfervations made at Clermmt and Paris, compar'd 

 with others, made at Stockholm, as may be feen in 

 the Appendix to Mr. Pafcafs Book before-cited. 

 TheReafbn I conjecture to be, that the more Nor- 

 therly Parts have ufoally greater Storms of Wind 

 than the more Southerly, whereby the Mercury 



ftiould 



