C *41® > 
thus impregnated with Silver, had ftood foffie few days, 
and the upper part was become very clear , 1 decanted 
the clear Water, and poured it off from the Silver (that 
ftiil; lay in it) into another Glafs Tube 5 and turning the 
Orifice downwards, i kept it in that Politiou fourteen 
Days, almoft always in warm Sand, in order to try whe- 
ther the Chryftalline Particles would not by this means 
coagulate bigger, but I could not obferve that they did $ 
And as for the fecond Glals Tube, that fell out of the 
Sand in the Night and broke to pieces. 
After this, I took a little of the Aqua. Fortis that was 
impregnated with Silver, and having weaken’d it with 
common Rain Water, I put feme of it upon a clean 
Glafs, and fpread it over the Glafs as thin as I could 5 
and then put upon the faid Glafs, a fmall Particle of red 
Copper no bigger than a Grain of Sand 5 and prefently 
view’d it with my Microfcope , and obferv’d, that the Sil- 
ver Particles were coagulated out of abundar.ee of almoft 
inviffble Particles in the faid Water ; and tho I view’d 
tfrofe Particles with a Glafs that magnified them as much 
as poffible, yet they were unconceivably fmall, that I 
could perceive nothing elfe, but that tfaefe flender Parti- 
cles were made up of other Particles yet final letg but tho 
I obferved them never fo nicely, I could not difeover their 
Figures, even after their coagulations. 
Now as we fee thefe fmallChryftaliine Particles(which 
are really Silver J coagulared into fuch exaft pointed Hex- 
angular figures, juft as if they werefo many poliftfd Dia- 
monds, and that thefe Figures grew larger and iarger $ 
we cannot doubt but that thofe Chryftalline fmall Parti- 
cles have the fame form, even before they are obvious 
to our fight. 
Now, let us compare the coagulated Silver Particles, 
which are all of ’em, as it were, changed into Hexangn- 
lar Chryftalline Figures, with the pieces of Rock Chrjrftal, 
which are likewife all Hexangular, and we ftull obferve, 
that 
