wbo bad the Small Pox during Pregnancy. 133 
even this fever, the eruptions, and their progrefs, are not 
abfolutely proofs that the diforder is the fraall pox when 
it is caught in the common and natural wav: and in 
proof of this affertion it may be obferved, that pradiiti-. 
oners every now and then are miftaken. 
It may be alked, what is the true charadteriftic of the 
fmall pox ? That by which it differs from ail other erup- 
tions that w r e are acquainted with ? The mo ft certain cha- 
racter of the fmall pox, that I know, is the formation of a 
Hough, or a part becoming dead by the variolous inflam- 
mation ; a circumftance which hitherto, I believe, has 
not been taken notice of. 
This was very evident in the arms of thofe who< 
were inoculated in the old way, where the wounds were 
confiderable, and were dreffed every day ; which mode of 
treatment kept them from fcabbing, by which means this 
procefs w r as eafily obferved ; but in the prefent method 
of inoculation it is hardly obfervable : the fore being al- 
' 
lowed to fcab, the Hough and fcab unite and drop off 
together. The fame indiftindtnefs attends the eruptions 
on the Hein ; and in thofe patients who die of, or die 
while in, the difeafe, where we have an opportunity of 
examining them while the part is diftindt, this Hough is 
very evident. 
This 
