pofition the Sand would appear four, five or fix fided^ 
and not only fo, but where two fides joyned, f could 
alfo perceive fuch a point of a Diamond-cut ftanding 
out. ^ 
I have thought fit to caufe three of the Sand particles 
of the above-mentioned white Marble, as they were fe* 
parated from each other to be defigad. 
Fig. 6. A B C D E F repircfents one of thofe grains of 
Sand^ of which a great number compofe the white Italian 
Marble ftone, wherein at each of thefe Capital Letters you 
may fee its points or angles. 
Fig. 7. G H I K L M (hews you the fecond Sand, and 
thofe Letters the feveral points. 
Fig* 8. N O P Q^is the third Sand, wherein there u 
fnch a flatnefs NOP, as is obfervable in few Sands. 
I took a little piece of the (aid Marble, the parts of 
which were very clofe and corapadl, and making it red 
hot I dropt it in the Water 5 in the doing whereof, I 
obferved not only the Sand particles were feparated from 
one another,but Tome of them broke away with that vio- 
lence, that they were thrown out of the Water. 
I took fame of this Water prefently, in order to fee 
what Salts were part over from the Stone into the Wa- 
ter 5 and I could foon perceive a fort of a Membrane, 
or rather Scum over the Water, without being able to 
difcover any Particles in the faid Scum, the which I con- 
ceived to confift of coagulated Salts 3 and that there 
were fome fuch under the Scum 5 but they were fo ob- 
fcure that I could not much count upon them ^ and the 
more, becaufe they were hid by the faid Scum. 
I took then a larger piece of the above-mentioned 
Stone, and heating it red hot, I let it fall into the Water 
alfo, whereupon there came a thicker Scum over the 
Water, vv^hichl let lie upon it a^hcurs^ and then break- 
ing it, and taking a little out of the Water, I found it 
hard and petrify 'd, and placing it before my Microfcope, 
C c c c c c c c c to 
