. ..-^ ?~1 :^ -
 4^^
 ^ -. ^ *
j


the line of


equal summer rises, and that of winter sinkl, and


the ratio increases proportionally ;


proceeding into the region


of the Lakes, the lines again converge beneath the controlling


power of the waters, and the ratio of
modified accordingly; again advance


yond these ocean-lakes, the average


isotheral and


catarrh and influenza is
1ing into the interior be-
rises in proportion as the


isocheimal lines tend to opposite directions.


the other


divisions


the same


law obtains.


On the


Atlantic


coast, between the Delaware and Savannah Rivers, the annual


ratio


is 271,


while


average of the


interior


posts of the


Middle Division
their south than


, notwithstanding this class lies somewhat far-


the former, is 290.


As most of the


posts of


the first class of the Southern Division are on the Lower Mis-


eissippi, and are much


water, the


annual


under the influence of large


ratio is as low as 218


while


t


bodies of
he second


class,


which comprises the mild,


insular climate of East Flor-


ida, has


an average of


only


143."


thus see


that


large


bodies of water modify climate


favorably, and


that the ratio


of pulmonary disease increases with the increase of the mean


annual


ranges of temperature as regards the seasons, rater


than


prevalence of sudden


or diurnal


vicissitudes


that the injurious effects of moisture, even in cold climates, are
more than counterbalanced by the modification of the temper-


nature of the air induced by the warmth of the water


while


warm


climates, in


winter,


moisture


has a


positively


beneficial effect in limiting the diurnal vicissitudes.


As regards liability to disease in


Florida, a careful


exam-


nation


of the


" Medical


Statistics of the


Army," extending


through a long series of


years, personal


observation, and con-


versation with medical officers engaged in the Seminole
indicate a remarkable exemption, throughout the State,


War,
, fiom


malignant


with


or even


very


the exception


serious


diseases.


Northern


"At


Division," says


seasons,
Forry,


"the mortality is lower in East Florida than in any other elam


of poets."


He ascribes this, in a great measure, to "itt being


nearly


wholly


a state of


Nature."


Oircumstanoep have


hLanged since then,o of oure, and the oleariug of the Anert,
especially the hammock, ha developed in the sunear w n


a n-naiAamnhla In n an nU fwv


N MelthaahhfVf r Mti


*wa~L


I


I