£ middle Met from Baltimore 
to cape Hatteras. 3 Southern 
to Florida. 4 Florida tract, 
or peninsula. & Alabamian 
plains to Delta of Mississipi. 
6 Texas, beyond the Delta. 
7 Mexican tract. 8 Yucatan. 
9 Honduras. 10 Mosquitto 
shore. Each of these tracts 
has peculiar features of its own, 
which it would be too long to 
detail. 
4. The whole of these plains 
are unhealthy, chiefly in the 
warm season, except the sec- 
tions of it called Pine barrens, 
Limestone tracts, and the Sea 
Islands. 
5. The population is scanty, 
short lived, and subject to ma- 
ny kinds of fevers. The whole 
population does not exceed 10 
per square mile on an average, 
or four millions for the whole. 
6. Few cities are found 
there, Charleston, Savannah, 
New-Orleans, Yera Cruz, Ta- 
basco, &c. which are in it, are 
all proverbially unhealthy for 
half of the year. 
7. There are few springs, 
the streams generally coming 
from the hills beyond, or rise 
in swamps and lakes. 
8. Swamps, marshes, and 
shallow lakes are very com- 
mon, the waters of which are 
often colored as well as those 
of the streams flowing from 
them. 
9 Many swamps are peculi- 
ar and w’ooded, covered by 
Cupressus thyoides and disticha, 
Magnolias , Nyssas fyc. called 
cedar or cypress swamps &c. 
10 The Pine barrens are 
large dry sandy Mets, wooded 
by pines chiefly, thus healthier 
than the swamps. 
11. The soil is either wet or 
sandy, always light and poor, 
unless improved by marl or 
manure. Cotton is the main 
produce of the dry soil, and 
rice of the damp soil. 
12. Near the hills a diluvial 
soil is often met of a better 
quality, which has been w ash- 
ed thereon, and along the 
streams a deep and rich allu- 
vial soil is often found. 
IS. There are tracts of pure 
sand or gravel, totally unfit 
for cultivation, that produce 
only bushes or dw 7 arf trees. 
14. Along the Sea shore are 
salt marshes, flooded by the 
tides, but gradually left dry, 
and reduced to meadows. 
15. The sea recedes from 
the shore at the average rate 
of 3 to 5 feet in century, 
and the whole region may have 
been under w r ater two or three 
thousand years ago. 
16. The scatterred hills are 
chiefly of sand stone, pebble 
stone, shell stone, marl stone, 
&c., with fossil remains. The 
highest only rise from 100 to 
150 feet high. 
17- Under the soil or sand 
arc found small marly pits, 
with beds of clay, fossil shells, 
remains of fishes and reptiles. 
The hollow swamps appear to 
be the outlets that ejected these 
clays, and overwhelmed the 
animals. 
18. A brown or black coarse 
sand is found beneath the clay, 
compared to the green sand of 
