( 144^ ) 
the whole G!afs,in fonie places clofc togecher,inothers thin- 
ner, of different magnitudes, and many of them fmalf, 
that alcho I viewed them thro a good Microfcope tfeey did 
in a manner efcape my fight ^ infomuch ihat it is almoft im- 
poffible for a man to conceive, unlefs he has had ocular 
proof and demonftration thereof, thatfuch vaft numbers of 
Gold Globules could proceed from fo fmall a quantity of 
Matter, and who knows how many more Gold Particles 
niuft coalefce in melcing, to compofe one of thefe fmalleft 
Globules. 
Now tho the fmall Gold Particles could not be difcover'd 
when they were furrounded with Aqua, Regia^ •we could ea- 
fily fee the fliining Gold colour of them all, now (faving 
only the^ very fmalleft Globules) which was no unpleafant 
fight, for they all app«ared like fo many compleat round 
Pellets." 
In my former Letter I aftirm'd that that green ftufF 
is found upon ftill Waters ( which we alfo call Duck weed ) 
did not fpring from the Ground, but from Seed within 
it. 
But now in Winter, when thofe Ditches, in which I had 
feen much of this green Weed, were covered with Ice, I 
faw but a very little of it, and what I faw was very fmall 
of Leaf. 
Having confider'd this, I thought it might be poffible in 
warm weather for thofe green Weeds to fpring from the 
Earth, tho it did not feed upon the Ground, nor encreafe 
in bignefs there. 
For fuppoHng as it really happens, that thefe Weeds in 
warm Weather by the rarcfaftion of thofe Particles of Air 
in their Veffels are driven up to the fuperficies of the Water, 
the fame Weeds by the contraction of the Air in cold Wea- 
ther will grow heavier than th@ Water, and confcquently 
fink to the bottom, and according to the change of the 
Weather, will have their viciffitudes of emerging 6r ixxhfu 
ding/ 
This 
