( \797 ) 
t w^s there, it feem'd as if it boil'd^ which was occafi* 
on'd by the Air Bubbles that endeavoured to force their 
way out 3 affooa as the Aqaafortk had penetrated it to the 
fenfible part of the Skin, it caufed a Pain, which I endured 
a Httle while, and then I poured fonie cominoa Water on 
my Finger to weaken th^ Aqua, fortk *y but quickly after 
the Thorn-like Particle was encreas'd, as before. I took 
the fecond time Aqnafortk^ and let it lye fo long on the 
Skin, that it finarced more than it did before ^ and fince 
that time I have not perceived that Particle to grow any 
more. 
I have lying on my Desk a Linnen Handkerchief, which 
was ftain'd with Aqua, finis impregnated with Silver, with 
a black fpot about as large as a (hilling s after that this 
Handkerchief had been waftit 6 times, and laid to bleach, 
I cut out the black fpot, and burnt it upon a bit of Char- 
coal, and viewed what remained thro a Microfcope, which 
I found to confift of feveral Thoufand Globules of Silver, 
of an exceeding fmallnels. 
HI. A Letter from Dr W. Mufgrave, K % S. U 
Dr Hans Sloane, S. !?^. S. concernhig Hydatides 
Voided by Stool. 
THo the Particulars, difcharg'd preternaturally by 
Stool, have been of very different forrs ^ and tho 
Hydatides have been found in feveral parts of the Body, 
and (as appears from a late Tranfaftion) in the Urine 5 I 
do not find they are, from any good Authority, afRrm'd, 
to come off per amim^ or to be found in the DhSIus all-- 
tfierjtaris: An Inftance whereof,, falling of late in my way, 
is here prefentcd to you. 
Yyyyyyyyyy 2 la 
