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it is some gas \'lidely disseminated in the air, and
analagous to seleniuretted hydrogen, the product of
volcanoes, which poisons the air and subj ects all who
breathe it to an attack of influenza - \'/ere true, it
would be reasonab le to conclude that the great abundance
of ozone in Tasmania \'/ould neutralize it. Schonbein
expressly states , as the result of direct experiment , that
ozone destroy seleniuretted hydrogen gas . It is a
legitimate inference, therefore, that the aerial poison,
wh ich was so virulent and destructive to all ages in
Sydney, became so g:eatly weakened and neutralized \'>'hen
it reached Hobarton, by the more abundant prevalence of
ozone in Tasmania, that only the aged, feeb le and diseased
·
succumbed to the epidemi c.
In conclusion, Hall compared the meteorological phenomena in Hobarton in
July \'lith those in London at the time of the breaking out of the cholera
epidemics of 1832, 1849 and 1854 .
He found in most respects they were
similar - a dense, moist, sagnant air characterized them all alike .
HO\'>'ever, in one respect, they differed remarkab ly;
in the London
atmosphere no free ozone \'las detected, \'>'hilst in Hobarton it was in great
abundance.
salubrious .
This was the element which made the climate of Tasmania so
i'
. ;