[ 2 97 3 
Months, was not much altered, being only a little 
more brittle than the reft, and fomewhat mouldered 
on the Outfide. 
About a Fortnight ago, another Piece of the fame 
Stone was brought to me, weighing about eight 
Ounces Troy, containing near half the Nucleus and 
the innermoft Lamina cohering together. 
From all thefe Fragments, and the Defcription of 
the Stone given me by thofe who faw it, before it 
was broken in Pieces, it appears to have been of a 
fpheroidal Figure, about 1 6 Inches in Circumfe' 
rence, eonfifting of a Nucleus and feveral Lamina 
or Shells involving one another 5 fome of them are 
parted from each other, but the reft flick fo clofe 
together, that they cannot be feparated without break- 
ing. All the Lamina are compos'd of tranfverfe 
Stria , with their Points converging like Rays to- 
wards the Centre of the Nucleus . They are of a 
brown Colour, and fhine like Refin. The Nucleus 
is of an oval Figure, and differs but little in its Com- 
pofition from the reft of the Stone, having no other 
extraneous Matter in it but a few Pieces of Straw, 
and fmall Sticks, like the Twigs of a Broom ; fome 
of them appear intermixed with the Stria through- 
out the Body of the Stone. The external Surface of 
the Stone, and thofe Lamina that have been ex- 
pofed to the Air, look of an Afh Colour, are pretty 
even, but not very fmooth, having many fmall 
Holes in them. See Tab. III. Fig . 1, 2, 3. 
About the Beginning of laft July , five large Stones 
were found lying near one another in the Interlines 
of a Mare, which belonged to a Carrier in this 
P p 2 Town,, 
