The collections of organisms invisible to the naked eye are to be
kept in great antiseptic tanks, and employed in the purification
of the city 's refuse.
Mosquitoes will ultimately be destroyed, undoubtedly, by breeding
among them smaller creatures fatal to their existence.
Man, in his conquest and use of animal life, will run the gamut,
from the biggest elephant, employed as a public executioner in
India, to the invisible microbe, doing a work ten thousand times
more important all over the globe.
These infinitesimal microbes, bred and controlled by science,
will do regularly and methodically the work which buzzards and
vultures have done on land, which sharks and dogfish have done at
sea, throughout endless centuries.
To the marvellous workings of nature we cannot possibly give too
much thought or too great admiration. Gardens are filled with
beautiful flowers, and fields are fertile to-day because hundreds
of years ago sea birds were devouring the carcasses of dead fish,
acting as nature's scavengers, and building up the great guano
fields of South America.
There is a Peruvian millionaire in his big yacht, and there is a
rose in full bloom--the millionaire's money, the beauty of the
rose, come from those birds that picked up the dead fish five
hundred years ago.
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