( 2x66 P 
the moft of .thofe that are obvious to the Eye cannot 
however be eafily delineated. \ difcovered xnoreover 
futh cxjL^ceding fine Veffejs, that feveral hundfed of thcrrt 
are nqt equal to a fi^gle Hair in the Wool of Sheep. 
The Stone is of a wonderful and inconceivable figure 5 
for as the Canals or Veflels in Trees and Pianrs do aimoft 
all of them appear very regular, running fome Perpen- 
dicular, others Horizontally, the Canals of this Stone run 
fo ftrangely, that one can hardly form any Idea thereof, 
efpecially when one views the Particles ot it as they lye 
ini thofe fmall Cavities or thereabouts; 
The Cavities that are v/ithout thefe little Pipes in the 
Stone are of feveral fizes, and becaufe thefe Particles of 
the Stone that were ranked near the Cavities appeared 
very wonderful to me, I caufed the Painter to delcribe 
two of them as they ftood before different Microfcopes. 
Fig. 2. I. K. L. M. N. O. P. Q. reprefents a finall Particle 
o£ the faid Stone, ot which Q. I. K. L. M. N. lay near a 
Glvity that was in the Stone 5 and wherein are defcribed, 
Jaawell as it is pofTible to do it, thofefmall Pijj^i of which 
that part is compofed. 
Now as fuch a Stone is continually growing, or to 
fpeak more Philofophically, the Juices are always carried 
up through thofe Pipes, I fnppofe there happened fome 
obftruftions in bringing thofe Saps about L. M. by which 
means thofe little Branches that are deferibed by N. O. 
and P. Q. (hot them out into the Cavity of the Stone. 
I placsd before another Microfcopc a much fmaller and 
thinner Particle of this Stone, as you may fee in Fig, 3. 
S. T-U.W.X. Y. of which R.S.T.Y. lay near the Cavity 
that was in the Stone 3 and as is before faid, there hap- 
pening (ome Obftruftions in the Pipes or Velfcls about 
S. Tr U. by which the afcending Juices were forced to 
alter their Courfe, it cccpfioned an excrelcence ; which 
bent or protruded itftlf into the. Cavity of this-Stohc^Us • 
isMcribed S. a.W^ X.Y. , 
After 
