Brimftone, to the breadth of the back of a Knife,upon 
a thin flender peice of Hemp 5 and obferved that the 
burning Brimftone did not at all injure the Worms, fo 
far as I could fee ^ and about an hour after the bnm- 
ing of the Sulphur, I put the mouth of the Gi^;U . r, 
my Nofe, snd could ftill f)lainly perceive the^ fmell of 
the Sulphur. ' r*;^ ?: . : ^ : r, ■ 
Tis well known that when we burn SuVohur, the 
Sulphur does not peri(h, but only is divided mto fuch 
fmall particles, as are removed from our view : and 
accordingly in this experiment I faw an mfinirs num* 
ber of very (mall fialphureous particles, flicking to the 
infide of the Glafs, which appeared to me to be round. 
I have often filfd fuch a Glafs Ball with Water, and 
expofed it to the rays of theSun,(infteadof a grounded 
GlafsJ which were fo concentred that it burnt Pa- 
per. 
I return thanks for the communication of thefe 
Worms 3 efpecially, becaufe heretofore feveral people 
wanted to know of rne from whence they came^and ad- 
ded,that they did not come by generation,but (tarted up 
of themfelves 5 the contrary of which muft be looked 
uj5on as a certain truth. 
The living Worm that you was fo kind as to 
fend me , I have kept ftill alive, and cannot but 
think that 'tis become bigger fince I had it. Til try to 
bring it up fo far, till it turns into a Fly. 
Thefe Worms have a hard and ftrong skin, and may 
laft a long time. 
I remember, fome years ago my late Wife being 
much afflifted with the Tootii-ach, complain'd that 
the pain was fuch, as if the Flcfh had been gnawed 
through. 
Having called a Doftor of Phyfick oftner than once, 
a great many Remedies were try cl to no purpofe : at 
iait (he found benefit by dropping the Oyl of Vitriol 
into 
