J2 An unfa erfal volatile acid Spirit, 
Inability of the Sun’s Rays to drive them 
again from thence : and thefe extremely 
minute and adtive Particles, being contipu- 
ally in Motion, firike into, penetrate, and 
fix between the Pores of all Bodies capable 
of receiving them. Thus, mixing with 
faline Exfudations from, or certain Salts 
contained in Earths, Stones, &c. they may 
probably incorporate therewith, and con^ 
Crete into the hexagonal Shoots of Cryfial: 
filling up the Interfiices of Water, and 
becoming therewith embodied, they com- 
pofe that hard Subfiance we call Ice * 
which differs nothing from Cryftal in Clear- 
nefs, and perhaps would have the like Form, 
did not the Quantity and Situation of the 
Fluid prevent it ; fince we find that Water, 
Filling in fmall Drops, is concreted with 
the fame Particles into an hexangular Fi-. 
gore. ; - 
Thefe Particles firikmg into the Bodies 
of living Animals occafion the Senfation of 
Cold : if their Quantity be great, they pro¬ 
duce firft a fevere Pain, and then a Numb- 
nefs, by impeding the Circulation of the Ani¬ 
mal Fluids ; and if they are not driven away 
by Heat from Motion or otherwife, or their 
Quantity be much inoreafed, they flop the 
Circulations entirelpCand bring on certain 
, : i ' 1 •:.y. 'r: J . Q <sj . 'n,v. - 
* The freezing or fudden Change of Water into Ice, 
gives the beft Idea, how fcfjf'ital, Gems, fee. rnay be form’d 
and that too perhaps in a very fudden Manner. 
o Death* 
