( i4i^ ) 
a heat of the Fire that the Salts evaporated in Smoafc; and 
that pat t of the GSafs where there lay leaft of the Aqm Re- 
gia^ aCfumed a colour that was fomething upon the red, but 
where the faid Water lay thicker together, we could not 
fee the fine (hining Gold with the naked Eye, but whea we 
rais'd that Glafs, where the Gold lay higher to the light 
than the Microfcope , I faw that the Gold Particles were 
not united with the other, bur now and tlien Coagulated 
into Brandies, and where the Gold Particles w^ere not thus 
Coagulated they were fo very fraall, that how nicely focver 
I'viewed them they efcaped my fight 3 and tho there lay 
together moiie than a thoufand Millions of thefe fmall Par- 
tides, all of them did not make a body that was bigger than 
one fingle grain of a large Sand. 
Wiiere this Matter lay thin and difpers*d, I obferved that 
the (mall Particles thereof w^ere fuch folid and compact 
bodies, that did not admit of the ieaft Rays of Light 3 and 
where they lay fiogle 1 faw other Particles yet fmaller, wliofe 
Bodies were morc loofe, but I imagined thefe laft to be fome 
Particles of that Matter, which tht Aqua Regia had left be^ 
iiind it. 
Now after that the faid Aqua Regia had remain'd on fonie 
of the GlalTes feveral days, and the Salt Particles for the 
moft part were changed into a fluid Subftance, I obferve^ 
among feveral of the Coagulated Branches fmall diftinft 
Particles, which I fancy to be Gold, tho I could not for 
the fmallnefs perceive the colour of them. 
To fatisfy my felf herein, I took a fmall Glafs Bubble, 
with as much Aq^a Regia impregnated with Gold, as was 
equal to fomething more than a great Pins head, and fet it 
over fuch a ftrong Fire, that both the Glafs and Gold were 
upon the melting, then viewing the Gkf$ I faw very plain- 
ly that a fmall portion of the faid Gold was Coagulated in- 
to Branches, and that thefe Coagulated Particles were round 
knobs or bubbles* 
Thefe Gold Bubbles were difpenft in great numbers over 
the . 
