{ 1 555 ) 
compofed of feveral thoufands of fmaller particles, u hofi 
fliape I could not for my lifedifcover y and when I made 
a little bit of the faid Stone red hot and dropt it in © the 
Water, it diflblv'd into a white fubftance as fine as Meal 
or Flower, and thereby loft all its tranfparency, and 
each particle, tho its figure had^en a iongifh fquarej 
was now corapos'd of fuch fmall particles^ that it vvasim^ 
poflible to perceive any fliape it had. 
After this, I took another little piece of Stone, vvhich 
is callid a Mineral-ftone, and was brought hither from- 
Sumatra*^ the which wa5 fo rich, that the hundred weight 
of it contained near fifty Gilders of Silver, and thirty 
Gold. 
I took of the faid Stone about the bignefsof a common 
Bean, and putting it over a pretty fmart Fire, the SuJ-- 
phur, of which there was a great deal in the Minersl^ 
ftood in bubbles, and remained upon the Stone in the 
figure of round, black, burnt Globules ^ then 1 dropt it 
red hot into Water, where it remained whole, only with 
this differ eiice, that whereas before it was very hard, now 
it became very brittle, and having broken it, I perceived 
it to confift of irregular particles chiefly, tho Tome few 
were of an exaft Diamond-cut 5 but that which pleafed 
and fatisfied me moft, was, that I could behold much 
more plainly than before, the globules of Gold and Silver 
f lying Separately from one another, butfome of the for- 
mer were fo exceeding finall, that they almoft efcaped 
the fight in the Microfcope ; and forafmuch as the Gold 
is not near fo eafy to be melted as the Silver, I faw fome 
that the Fire had not force enough to reduce it to glo- 
bules, and upon it lying a fmall globule of Silver, which 
the Fire had brought into that figure 5 and tho the Gold 
and Silver toucht each other, yet they were not united^, 
becaufe thet ire where thatGold lay was not ftrong enough 
to reduce it to a fluid body. 
I have often- obferved ia-thefe Mineral St onesj that one 
■ p2Tt 
