C 4®^4 ) 
forth : It was covered over with graflTgreen matter^which foon 
dryed , ^nd left the ftone of a whitifh colour, as it is to be feen^ 
It is but light in proportion to its bulk,weighin^-afcem 7 grains^ 
and'tismuch of the fbape of our ordinary horfe-beans» There 
are vifible imprcffions upon it of feme Capillary and fmall vefF- 
els , it was bred amongft. Laftly, it is fcabrous or rough, fands 
like, although the fubftance is Tophaceous. 
The Accidents accompanirig the working away of this Stone 
ifoT the incifion was meerly obftetrical,) and the place of its 
birth give occafion to call the diftemper a Ranula. Yet in truth 
this was nothing elfe but one of thofe Tumours czWtiiAtheromai 
and therefore we will name [i lapis Atheromatis. 
An ExtraUof aTuetter g/ the fame Mr. LiRcvy written from York 
Jpril II. 1^72* concerning animated B^otk-htiiTS'^reQifyinga 
'Vulgar Error. 
iSir, 
T Cannot difcover any thing new and rare in natural Philofo- 
* phy5but I muft forthwith make you participate of my good 
fortune^ and I affure you^the relational am about to make yon, 
is of a thing very furprifing. 
It hath been credibly reported^ that Horfe hairs thrown into 
water will be animated 5 and yet I fliall (hew you by an unqueft- 
ionableobfervation,that fuch things as are vulgarly thought anr» 
mated Hairs are very Infeft^j nouriflied within the bodies of o- 
ther fnfeftsjeven as lehneumones are within the bodies of Cater- 
pillari. 
I will premife the particulars concerning thisAnimal^as I find 
them collefted by the Induftry of Jldrovandus^znd fave you the 
trouble of that voluminous Author* 
This Infe<a( faithhe ) feems to have been unknown to the 
Ancients , as it is called by the moderns feta aqnatica or vermis 
fetarius^^irh^t from the moft (lender figure of the body 5 or be- 
caufeitis thought to be generated of an horfe-hair pucrifying 
in watenThc Germans call them by a name rendred Vituli a^ua* 
tici. 
It is bred in corrupt waters 5 perhaps of horfe-hair , for (faith 
'Alhertus upon his own frequent trial^ as I find him quoted by 
j{ldrQvandm^)ihtk hairs ,put into ftanding waterjmove and are 
inama:ed,or3 ashe words h^ vitam ^ fpiritum accipiunt^ & moven* 
» ( 
