/ 
Bg. I, A. B. C.D. E. F. reprefents a fmall Particle of 
a little Diamond, as it appear’d thro’ a Microfcope ^ in 
which between A. and B. asalfo between C. D, E. and F. 
you may obferve a great Number of Lines or Fibres in 
the faid Djaraond5 each of which Fibres was occafion’d as 
I fnppofe by the -Increafe or Acceffion of new Mattter, 
which whether it was form’d in one Day or more, is not 
much to the purpofe. 
Now that the iacreafe of Diamonds is madeinfuch an 
Order and^Manner, we may conclude the rather, -becaufe 
we are fure that the fame thing happens in the Coagula- 
tion of many Salts. 
I have taken fome of thefe Particles feveral times, and 
laid them upon burning Wood-Coals ’till they were red 
hot, and in'that Condition thrown them into the Water, 
to fee whether they wou’d burft to Pieces, or whether 
there wou’d be any reparation of Matter^rom’them^ but 
that never happening, I muft conclude mat there was no 
Air nor any Moidure (hut np within them. 
One Particle of a Diamond appear’d to the Sight, as 
Fig. 2. G. H.I. K. L. after I had made it red hoc, and 
Oaked it in Water feveral times 5 in this alfo, between L« 
and C. you may obferve feveral fmall Streaks or Fibres ; 
and when I obferved it the laft time, after I had taken it 
out of the Water, it appear’d betweea L.G. H. and I. juft 
as if fome fmall Scales had been feparated from it^ ju(f 
like the fhining or gliftering Parts which I have often 
feen in feveral Stones, and particularly in the great Flint- 
Stone that is brought in Ships from Greenland for Ballad, 
when the Whale-Fi(hing is not good, and when itsChry- 
-■ftalline or Diamond Tranfparency is gone- 
Vig. 3. M. N. O. P.Q. R. reprefents aI(o a Particle of 
a Diamond, as it appear’d thro’ the Microfcope, after it 
^liad-been made feveral times red hot and thrown into 
cold 
