


























Experiments in diffoving Le. VII, 

the Winds, or otherwife, are carryed into it; and fo caufeth it to 
prefs upon the Mercury inthe Box: but after that in fome time the 
Salts are diflolved or incorporated in the Aqueous Parts of the Aer, as 
in Rain or Szows {o {oon as that is done,there is fome Space gaind; and 
fo, before any Weather falleth, the Aer is lefs crowded, and preffeth 
lefs upon the Mercury inthe Box, which gives way to its defcent’ in 
the Cylinder. 
5. §. From hence alfo it is, that the Mercury rifeth higher with 
Cold Winds, than it doth with thofe which areWarme. Both becaufe 
that in cold Winds there is the greateft quantity of Nitre: and that the 
coldeft Winds, axe ufually the dryeft. So that the Niatre wanting 
Moyfiure fully to diffolve its, it takes up fo much the greater {pace, and 
fo caufeth a greater preflure in the Acr, as hath been faid. 
6. §. Lafily, For the fame reafon it comes to pafs, that the Mer- 
cury firft rifeth higher, and-then falleth lower before Sow, than it doth 
before: Raiz.. Becaufe that for the produGion of Snow, the Aer is 
crowded with a greater quantity of Mitre, or fome other like Salts 5 
which before they are diffolved, take up! fo much the’ more fpace 5 
and afterwards fo much the lef, even before the Szow falls: as hath 
been proved. 
| OO Niet Peed ES 


