cing very light for a Stone of that Bulk. He furthef defcribes to be ofa 
whicifli colour, lighter than Alh-colour ; perchance (faith he) not unlike 
to that recited oxxtoi Sc alt ger by WSojk in his Effay of J^irmnefs p9g.238. 
qui aeris contacts pojfea wgjp/eam turn fpecietn turn firmitatem coftcreverat* 
It had no deep afperities, and had fomewhat of anOval figure^ but I efs at 
one end, than a Hen-Egge, and bigger and blunter at the odiec end, than t 
Gook egge. 
This Stone, (fo he concludes) is intepded for the Roja I Secieiy ^wnh the 
Teftimony of the Chirt^rgion^ that performed the Operation,and other Wit- 
neffes of fpecial credit- where alfo will be annexed the manner of 
Operation* 
It appears by this laft claufe (to add that on this occafion) that tb § Well- 
wifher to the Improvement of all ufefull knowledge, has taken notice of that 
confiderable CcllectiQn of Curiofities, lately prefented to the lately namM 
^Society for their Repftorj^ by that pubiick^minded Gentleman Mr. Da- 
nul Colwall^ a very worthy and ufeful K'embcr of that Body : To which 
Rcpofitory whatfoever is prefented as rare andcurious, will be with great 
care, together with the Donors names end their Bincficen'ce recorded, and the 
things preferved for After-ages, (probably much better and fafer, than in 
their -own private Cabinets ) and in progrefs of Time wilf be employed for 
confiderable Philofophical and Ufefuil purpofes • of which perhaps more 
largely in another place, 
A Relation 
6f a kj^d <?f Worms that eat cut Stones^ 
This is taken out of a Letter, written by one M^de la Voje to /iuteut^ 
to be found in the 3 2* fourml des Seavans \ as follow?* 
1 N a -g^eat and very ancient Wall of Free-Stone in the at 
.1 Caen in Normandy, facing Southward, there are to be found many Stones 
fo eaten by Worms, that one may run his hand into raoft of the Cavities 
which are varioufly faftiion'd, like the Stones, which 1 have.feen wrought 
with fo much Art in the Louvre i In thefc cavities there is abundance of iive- 
Worms,their excrement, and of that Stone- duft, they eat. Between many 
of 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 days • and then opening 
the Box, the Stone feem*d to me eaten fo fenfibly, that I could no longer 
doubt of it, I fend yoa the Box and the Stones in it, together with the living 
Worms : and to fatisfie your Curiofity, I fhall relate to you, what I have 
obferved of them both with and without a Microfcopg. 
V a Thefe 
