408 ESSAYS anp OBSERVATIONS 
the different /fadia of the difeafe, and at- 
tended the funeral of thofe who died of it. 
And, laftly, whenever the difeafe appeared 
here, it was eafily traced to fome perfon 
who had lately arrived from fome of the 
Weft-Indian !flands, where it was epide- 
mical. Altho’ the infeétion was fpread 
with great celerity thro’ the town, yet, if 
any from the country received it in town, 
and fickened on their return home, the in- 
fection fpread no further, not. even fo 
much as to one in the fame houfe, 
Ill. THE fubjects which were fufcep- 
tible of this fever, were both fexes of the 
white colour, efpecially ftrangers lately 
arrived from cold climates, Indians, Mi- 
ftees, Mulattoes of all ages, excepting 
young children, and of thofe only fuch 
as had formerly efcaped the infection. 
And indeed it is a great happinefs that 
our conftitutions undergo. fuch alterations . } 
in the fmall-pox, meafles, and yellow fe- 
ver, as for ever afterwards fecure us from 
a fecond attack of-thofe difeafes. There 
is fomething very fingular in the confti- 
tution of the negroes, which renders them 
not 
