304 Of Regular Stones, Part III. 
Not only Mofcardo, but others reckon thefe amongft 
the Ceraunicz or Thunder-bolts. So called, becaufe believed 
fometimes with Thunder to fhoot down with violence out 
of the middle Region. Amongft other Relations hereof, 
oOMuf. that of Terzagi (a) is very exprefs, who faith, That the 
Septal. Corps of one (truck dead with Thunder, being infpected in 
the prefence of - Sept alius, and feveral others, and a black 
Wound obferved about the Hip, and fearched to the Bone 5 
they found therein a round and edged Stone, which being 
broken, had a very ftrong fulphunous ftink. With this 
Author, I fcarce think any thing of this nature incredible, 
(b) Muf^um to thofe that read the Relation given at large by Wormius {b) 
of the Norwegicl^ Moufe. 
Thus far or Regular Stones, whofe external Form is Cir- 
cumscriptive, or at lead depending upon the whole Stone. 
I lhall now defcribe thofe, whofe Form is Accumulative, or 
where there is a repetition of the fame figure, or near it, in 
feveral Parts. 
The GRAPE-STONE. Botrites, Wormio. Here are two 
or three forts. One folid, of a yellowilh colour, an inch 
and * long, knobed with feveral fmall Clufters, like a young 
bunch of Grapes. 
The HOLLOW GRAPE-STONE, with high Knobs 
or white Berries clufter d all round about, as in the former, 
and fomewhat thicker. 
A SEMI-GRAPE-STONE, with white Drops or Berries 
only on one fide. They all make a vehement Effervefcence 
with Acids 5 and are a fort of Stalagmites, next of kin to 
the Confetti di Tibuli before defcrib'd. 
The STAR-STONE. Afteria vera, Boetio. Generally 
of a ? or ? an inch in Diametre, confifting of feveral Joynts, 
evenly piled one upon another, of a Pentagonal Figure, 
like a Star, and with the fignature alfo of another on both 
fides, which is compofed of Ihort tranfverfe Strict. When 
broken, it lhines like the Lapis Judaicus, or the Entrochites 5 
to which latter it is next of kin. Sometimes they are 
found fingle. When confifting of more Joynts, it may 
rather be calPd Synafteria. Several both of the joynted and 
1 ingles ones are here preferved. 
A very hard Stone, a kind of Pebble with the fignature of 
the Afteria upon it. 
Mr. 
