29 |3 87 |1 32
Council Bluffs, | 1 08 | -21 | 1 29 |19 68| 6 54 |2 95 |1 25
Cantonment Jessup,| 97 | 7 | 90 |18 63| 4 49 |7 25 | 05
Baton Rouge, | 99 | 18 | 81 |20 16| 4 08 |6 16 |
- _signifies below zero._

The times of observation at the above posts were 7 A. M., and 2
and 9, P. M. The mean of each month was deduced from 90
observations, and of each year from 1095 observations. The reader, who
is desirous of following up this comparative view of the climate between
the Atlantic states and the Valley of the Mississippi, can compare the
observations recorded in these tables, with similar observations made in
the same parallels of latitude. He will find the climate of the West
quite as uniform, and the weather as little variable as in the Atlantic
states.

_Diseases_,--_Means of preserving health, &c._ Of the Lower Valley, I
shall say but very little on this subject. Dr. Drake observes, "The
diseases of this portion of the Great Valley are few, and prevail
chiefly in summer and autumn. They are the offspring of the combined
action of intense heat and marsh exhalation." They are generally
remittent and intermittent bilious fevers. Emigrants most generally
undergo a seasoning, or become acclimated. Many persons, however, from
the northern and middle states, and from Europe, enjoy health. In sickly
situations these fevers are apt to return, and often prove fatal. They
frequently enfeeble the constitution, and produce chronic inflammation
of the liver, enlargement of the spleen, or terminate in jaundice or
dropsy, and disorder the digestive organs. When persons find themselves
subject to repeated attacks, the only safe resource is an annual
migration to a more northern climate during the summer. Many families
from New Orleans, and other exposed situations, retire to the pine
barrens of Louisiana, in the hot and sickly season, where limpid
streams, flowing over a pebbly bed, and a terebinthine atmosphere are
enjoyed. Eight months of the year, are pleasant and healthy in the Lower
Mississippi Valley.

The advice of Dr. Drake is, that "Those who migrate from a colder
climate to the southern Mississippi states, should observe the following
directions: First--To arrive there in autumn, instead of spring or
summer. Second--If practicable, to spend the hottest part of the first
two or three years, in a higher latitude. Third--To select the
hea