PKINOIPAL DISEASES. 
79 
acquaintances from the North and West have resided here 
for fifteen years past, enjoying almost uninterrupted health, 
and entirely escaping the inaugural disease. 
Many escape unhurt during the first year, and are taken 
down the second season. They allow disease to accumu- 
late in their systems for twelve or eighteen months, and 
then it manifests itself in the form of a bilious fever. To 
all such our advice, already given, is specially applicable. 
