viewed by Micr of copes. 43 
ceedingly minute that, examining it in the 
former Manner, he concludes that the Dia¬ 
meter thereof is ten Times fmaller than the 
fecond Sort : it will then follow, that a 
thoufand of thefe are but equal in Bignefs 
to one of that fecond Sort. 
The fir ft Sort multiplied by the fecond, 
and the fecond by the third, will plainly de- 
monftrate how many of this third and mi¬ 
nuted Sort are requifite to make up the 
Bulk of a lingle Grain of Sand : the Procefs 
of which is as follows. 
Firft Sort, 1. whofe Diameter is lefs 
than that of a Grain of Sand 
12 Times. 
12 
144 
Of the firft Sort, 1,728 in a Grain of Sand. 
Second Sort, 2. whole Diameter is lefs than 
that of the firft Sort 
4 Times. 
4 
16 
4 
4 64 in one of the firft Sort. 
Third 
