mmji are the beft Foundation, upon which we can fafcly 
proced in the Prafticc of Phyfick. 
11. AnAhJlrdl of part of a Letter from T>r Bonomo ta 
Stgnior Redi, containing fome Obfer^ations concerning 
the Worms of Humane Bodies. By Richard Mead, 
HAving frequently obferved that the Poor Women when 
their Children are troubled with the/^^A,do with the 
point of a Pin pull out of the Scabby Skin little Bladders of 
Water, and crack them like Fleas upon their Nails 5 and 
that the Scabby Slaves in the Bagt2o at Leghorne do often 
praaice this Mutual Kindnefs upon one another^ it came 
mto my Mind to examine what thefe Bladders might really 
be. 
1 quickly found an Itchy perfon, and asking him where 
lie felt the greateft and moft acute Itching, he pointed to a 
^feat many little P^///e/ not yet Scabbed over, of which 
picking out one with a very fine Needle, and fqueezing 
from it a thin Water, I took out a veryfmall white Globule^ 
fcarcely difcernible : Obferving this with a Microfcope, I 
found it to be a very minute Living Creature, in ftiape re- 
fembling a Tortoife, of whitifh colour, a little dark upon the 
Back, with fome thin and long Hairs, of nimble motion, 
with fix Feet, a fharp Head, with two little Horns at the 
end of the Snout 3 as is reprefented in Fig. i and 3. 
Not fatisfied with the firft Difcovery, I repated the 
fearch in feveral Itchy perfons, of different Age, Complexion 
and Sex, and at differing feafons of the year, and in all 
found the fame Animals $ and that in moft of the Watery 
Puftiries, 
