1922.] Indian Science Congress L.S8.C. 165 
‘‘ carriers” in the spread of human disease merely served to confirm 
this view ate Bs direct epidemiological research along fresh channels. 
The ne which epi i 
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ee data then available) to neha in true hippocratic fashion the 
outbr of epidemic with specific atmos eric states 
But nowadays when, thanks re the records maintained by t 
Department preniaea over by Dr. Gilbert Waller, meteorological da he 
extending over many years are available, epidemiological investigators 
usually omit all reference to the influence of climatic conditions or refer 
anner. 
ne 
Nor ps the réle of climate in epidemic diseases fare any better in 
modern text-books in which this subject 1s dismissed in a paragraph w whose 
brevity i is rendered all the more conspicuous by reason of wide excursions 
into the domain of bacteriology, entomology and other ancillary sciences. 
i ested m h i 
& nfection, no te th 
merits of the miasmatic hypothesis, pd it is af object 9 pian the 
i in the mechan o 
before you some of the reasons for Y doneleiile that, this 
factor plays a réle of profo mae importance in determining the occurrence 
of epidemic outbreaks. 
{2). The I. Siti of Climatic Conditions on the Transmission shi: Malaria. 
tion is likely to be emetiaad by the study of the réle of climatic and 
me oteorological conditio 
It has long been nos nown that malaria Honrishee pares in warm 
pti aan in the hot ole in the temperate zone, and it h 
h 
Sagi en observed since _— times that high atmospheric 
noma is ay reas to the diseas 
epidemiological signi.icance attaching to these facts has css ibe 
ide 
have 
sbitected sin Rg little. eesiichgss only a few experiments hav: 
iain a rd to the influence of temperature, whilst the precise matle 
of humidity has never “ars aeunaae determined. ee 9 ge te 
lect, in the case of temperature, is probably due to me nisi ata tlas 
influence was ees — 100 Cle nt pana rt obasesed 
tion, whilst in the case of humid ity we ae in raps by its sone 
by the view as high aio favour 
bene rs ndi ions giving r 
t it is surely i ‘dient to a aga 
vita tru ith, for mipeees i like anes it seems 
possible 
thei ions ce on the oengenans cycle of the wlan parasi 
nsect-carrier, will be capable of influencing the 
and thereby the imaliiomes of the diseas 
