( 3 21 ) 
being very light for a Stone of that Bulk. He further defcribes it to be of a 
^hitiiB colour, lighter than Aih-colour ; perchance (faith he ) not unlike 
to that recited out oiScaliger by M. Boyle in his Effay of Firmnefs pag.2 3 8 e 
qtii aerie eoniatlu fofiea in gypj 'earn turn fpeciem tumfirmitatcm cwiireverat* 
It had no deep afpeuties, and had fomewhat of an Oval figure, but lefsrat 
one end, than a Hen-Egge , and bigger and blunter at the other, than a 
Goofe-egge. 
This Stone (fo he concludes) is intended for the Royal Society t with the 
Teifimony of the Chirargion } mat perform’d the Operation, and other Wit- 
neffes of fpecial credit j where alio will be annexed the manner of 
Operation. 
It appears by this laft claufe (to add that on this occafion) that this Well- 
wifher to the Improvement of all ufefull knowledge , has taken notice of that 
confiderable Cejlettion of Curiofitles lately prefented to the lately nam’d 
Society for their Reyofit&ry , by that Publick-minded Gentleman Mr. ‘i>4- 
met Colwallj a very worthy and ' ufeful Member of that Body : To which 
Repofirory whatfoevet is prefented as rare and curious, will be with great 
care, together with the ^Donors names and their Beneficence recorded, and the 
things preserved for After-ages, (probably much better and fafer, than its 
their own private Cabinets j) and in progreis of Time will be employed for 
confiderable Philofopbical and Ufefull purpofes ; of which perhaps more 
largely in' another place. 
A Relation 
Of a kind of Worms, that eat out Stones .. 
This is taken out of a Letter, written by one M. de la Voye to M# Afi&gut^ 
to be found in the 3 2. Journal des Scavans j as follows, 
I N a great and very ancient Wall of Freestone in the Benedi Bins Ably at 
Caen in Normandy , facing Southward, there are to be found many Stones 
■fo eaten by Worms, that one may run his hand into moll of the Cavities 1 
which are varioufly fafihion’d, like the Stones , which I have feen wrought 
with fo much Art in the Louvre : In thefe cavities there is abundance of live® 
-Worms, their excrement, and of that Stone-dull, they eat. Between many 
©f the Cavities there remain but leaves , as it were , of Stone , very thin, 
which part them. I have taken fome Of thefe living Worms, which I found 
in the eaten Stone, and put them into a Box with feveral bits of the Stone, 
leaving them there together for the fpace of eight dayes ; and then opening 
the Box, the Stone feesxfd to me eaten fo'-fenfibly, that I- could no longer 
„ doubt of it, 1 fend you the Box and the Stones in it, together with the living 
Worms 1 and to fatisfie your Curiofity, I fnall relate to you , what I have 
obferved of them, both with and without a Micro} ctyt, 
V ' a- . Thefe 
