C <54? ) 
iangular § all thefe Sands are to be confidered as com-^ 
men Sand. 
I took one of the above-mentioned long flender 
Sands, which I judged alfo to be one of the thickeft, and 
placed it before a Microicope, as y-ou. may fee in Fig. i^, 
N O PCL5 in which you may diftinftly perceive four flat 
fides. 
• I have obferved in many Sands, that their bodies cou- 
fifted of unfpeakably thin fcalesor fcaly particles. 
Among thefe (hining Sands I difcovered othersthat had 
no luftre at alJ, neither had any of their particles after I 
broke them to pieces, but it appeared to be a dark red 
matter, and in other Sands fo broken there was not only 
a red matter, but even an hundred fiiiniog particles^ all 
proceeding from one Sand. 
I have alfo feen fome Sands, that in the middle of thei r 
fhining fides reprefented fmall figures that gave no lutuc^ 
but as I viewed them more narrowly, I found it was a 
red matter, incorporated as it were in the Sand. 
I have placed feveral Sands of the courfeft fort before 
a Microfcope for the pleafure I took in the viewing them^ 
for one feemed to reprefcnt an agreeable Rock of Stone, 
another, a deep Cavern, infomueh, that feveral perfons 
whom I made partakers of the Gght,were aftoniftit to fee 
fuch various figures in fuch fmall bodies, 
Thefe laft Sands were not, I fuppofe,fo fhaped from the 
beginning, but thofe cavities and protoberancei which wc 
cfpyed in them, came from various chances and accidents, 
as by thecollifion of other particles of Sand which wera 
bigger than thefe, which in their turn were again broken 
by other bodies of a larger fize, luch as Pebble ftones, d^-c, 
. I have cleaved fome grains of Sand, and difcovered 
figures of Triangles in them. 
I have by rae fome draughts. of Stone composed of par- * 
ticks of Sand, but becaufe I will not heap up toomanf 
thingi together * I (hall break ofFherv^. 
Bbbbbbbbb 2 
1 
