[ *77 ] 
excited in her, have been immediately obferved to 
glow with blu flies ; as alio when, in purfuance of 
her buiinefs, fhe has been expofed to the aCtion of 
the fire upon thefe parts, fome freckles have made 
their appearance. After having defcribed her pre- 
ient appearance, as well as I am able, I fliall not 
pretend to offer any conjectures of my own upon the 
fubjeCt ; left being led away by a train of reafoning, 
I fliould lofe myfelf, in endeavouring to eftablifh a 
favourite hypothefis j but, on the contrary, fliali 
confine myfelf to a Ample narration of fuch fads, as 
may prevent miftakes, or obviate difficulties, arifing 
in the inveftigation of this difficult piece of phyfical 
hiftory. And in the firft place, left the change 
fhould be thought the confequence of a previous 
morbid ftate, fhe declares, that, excepting about fe- 
venteen years ago, when fhe was delivered of a 
child, fhe hath never been afflicted by any complaint 
of 24 hours continuance ; and that fhe never remem- 
bers the catamenia to have been either irregular or 
obftruCted, only during this pregnancy: fhe hath 
never been fubjeCt to any cutaneous diforders, or 
made ufe of any external applications, by which this 
phasnomenon might be produced. The effeCts of 
the bile upon the fkin are well known to phyficians, 
and have given rife to an opinion, that its colour was 
determined thereby : for my own part I cannot be- 
lieve it has any thing to do here, fince, from all the 
circumftances I have been able to colleCt, I cannot 
find the leaft reafon to fufpeCt, that this fluid, whether 
cvftic or hepatic, has undergone any alteration. As 
uftion is known to make the fkin of negroes become 
white, and as fire is daily employed in the bufmeifes 
Tr ''>rTT Aa 
