[ 266 J 
from any liquid Body, two things arc requifite : Firft, 
that the redundant Liquor, in which the faline Par- 
ticles arc kept too difperfed and remote to attract 
each other, be difeharged (which is ulually performed 
by Evaporation), and that the Remainder be expofed 
to a colder Air This ftmplc plain Procefs will pro- 
duce all the Varieties of Cryflallization ; the Salts 
contained will fhoot into their peculiar Forms, point- 
ing forth their Darts, regular Planes, or Spires, into 
fuch Figures as are proper either to their native or 
compounded Salts. From this cafy and incontcftable 
Procedure of Liquids into figur'd and folid Bodies 
(to which nothing more is required than Heat and 
Cold), may it not appear probable, that fomething 
like this has happened, and does ftill happen, among 
our Spar-Loads in the Mine? For Inftance : When 
the Juice of Spar, impregnated ftrongly with Salts, 
which have been from time to time imbibed, is fuf- 
ficicntly drained from the Water (which not only col- 
lected the fparry Mafs, but kept it in a fluid State), 
cither by natural Heat, fo common in Mines, or by 
the Water’s running off into Crevices, where the 
ftiffer Stone-juice cannot follow it; in other Words, 
when the Water deferts the Spar; the Spar, as foon 
as a colder Air fucceeds (16), fhoots, and is protruded 
into Figures by the Salt which it contains (17) j and 
thus 
(16) Cc Cryjf alius eft foccus, quern frigus intra ten am cotiglutinavit ” 
Agric- p- 2S2. 
(17) Mr. Boyle's Opinion is, that fuch Stones (viz. Spars and 
Cryftals) were originally in a fluid State; that the Figure of them is 
determinate and geometrical, like the Cryftals produced by Alum, 
Nitre, Vitriol, in Water j and their Texture like the Congelations of 
Salt produced in Cryflallization by Cold. 
Grew 
