Part III. Of Regular Stones. 
Medicinal TROCH, or a thin CAKE of Terra figiUata, 
having as it were the Impreffion of a fmall Seal on one 
fide. Tis a perfed Pebble, not affected with any Acid. 
The EAGLE-STONE. JEtites. All the former Stones 
were round and folid. This is hollow. Named from a 
vulgar opinion, That the Eagle, when ihe fits, carries it to 
her Neft, to keep her Egg from being addle. And this, 
joyn d with another,That Bodies operate according to their 
Signature : as this Stone, which often contains, or if you 
will, goes great with another Stone within it, Several forts 
hereof are here preferv'd. 
The FLORID Male EAGLE-STONE. A rare kind. 
Tis a perfect Flint, and femiperfpicuous $ of a Globular 
Figure, and as big as a good big Apple, or near three inches 
in Diametre. Hourifned all round about with fevcral fets 
of Rings one included within another, with fome fimili- 
tude to fo many little Rofes or double Crowfoot- Flowers. 
Tis very ponderous, being almoft folid. Yet hollow at 
the centre 5 containing not one, but feveral fmall Stories, 
as is argu'd from the noife they make, upon ihaking the 
Stone. 
An ANGULAR or Ridged Male EAGLE-STONE. 
This alfo is about the bignefs of a good large Apple. Of 
a brown colour, but daubed over with a kind of Okre 5 
and was therefore probably bred in a Bed of the fame. 
Tis very heavy $ which argues it almoft folid, as the for- 
mer, and to have only a fmall hollow in the centre. 
An ORBICULAR EAGLE-STONE. About the big- 
nefs of a midling Apple. The outfide, rough and brown. 
Inwardly black. The Concave furface daubed with a fort 
of Okre^ a quantity of ; which, 'tis likely, it once con- 
tained. 
An OVAL EAGLE Stone. About as big as a midling 
Walnut. Without, blackifh and rough, as it were granulated 
with fome femiperfpicuous Sands. Smooth within, and of 
a fpruce Okre colour. On one fide, it hath an oblong 
Aperture, with a fmooth Lip as it were turned outward. 
One half of an OVAL EAGLE Stone. Tis near three 
inches in Diametre. The infide rough-caft with fmall 
Grains, in fize, like thofe of Bay-Salt $ fo hard as to cut 
Gla(s. 
Q_q The 
