( 243 *> 
that the firft coagulations of the Rock Chryftal are ex- 
ceeding fmall as they are congealed out of the Air j and 
from time to time, fo long as that matter is in the Air, 
it prefer ves the Figure which it had in the beginning, un- 
Iefs it be hindred by other Particles lying about it,, as we 
may in fome manner obferve in the coagulated Silver 
Particles, which tho they have lain fome Months within 
the Glafs wherein they were coagulated, during a very 
Rainy Seafon, yet I could not dilcover the leaft altera- 
tion in them- 
Now it feems very firange, that moft of the Rock 
Chryftals are Hexangular, and end in an Hexangular . point j 
and tho fome of them are flan ting and almoft flat, where 
they are joined to the Rock , yet one end or point of 
them is likewife Hexangular ; But when we fee with our 
Eyes Salt- Petr e diffolved in Water, and united with it, 
and afterwards coagulating therein, we (hall difcover all' 
the exceeding (lender and long Particles thereof to be of 
an Hexangular Figure, excepting fuch which coagulating 
in a heap together are irregular 3 and as the Chryftals 
end in an Hexangular point, fo the ends of thefe Salt 
Petre Particles run into a flattifh or jBeaf/e-like Figure. 
So we daily fee in coagulated Sugars, that we call Su- 
gar Candy, molt of their Particles to be of a Quadrilateral 
Figure, of which two of the oppofite fides are often 
broader than the other two, and that the ends of them, 
when they don’t flick to other Sugar Particles, run into 
a (harper J3<*#/e-like Figure. 
In (hort, we fee tfcat the coagulated Silver Particles 
appearing like Chryftals are all of them Hexangular, and 
end in two (harp points, and that the Rock Chryftal is 
almoft always of the fame Figure 3 and moreover, that 
Salt-Petre does alfo coagulate into Hexangular Figures 
ivith a BeatleAike (harp point $ but why fome coagulate 
)ne way, and others another, is a thing unconceivable in 
by Opinion, and which can no ways be accounted for. 
I did 
