(^^4) ; 
diflfeh from Glafs both in Refraftion arid 
other Operation j for as much as in Glafs 
there are not any parts of the diiTolving 
fluid, being thenCe driven away by the 
violence of the Fire: For the fluid,wher6 » 
in Chryftal is concreted, is to Chryftal 
even as Common Water is to Salts ^ 
which ihight eafily be prpved by an In* 
dudion of thofe things, which the Con¬ 
cretion of Salts hath common with the 
Concretion of Chryftal. But leaft I 
ihould too far digrefs from my purpole^ 
by enlarging upon all thofe particulars j 
1 fhall recite but one Experiment,which 
Icemed to me very confiderabie. In one 
aind the fame Stone, the plates ot it, 
parting in divers plaCes from one ano¬ 
ther, were full of Ghryftals, of which 
Ibme wcr6 aqueous, fomc very fliining, 
fome white, fonie amcthyftine, mixed 
Without any confufion of colours 5 juft 
in the fame manner as the Experiments, 
here made at Flehnce With Salts, do 
iliew,that Fitriol and Atom, being diifol- 
ved in one and the fame Water, after 
fome of the Water is wafted, each of 
them coagulaieth a part, without any 
mixture of the parts of the other. 
The 
