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Paul Ehrlich, a German
physician of the Hebrew race. He found that the aniline dyes were useful
for staining slides under the microscope, for they would pick out
particular cells and leave others uncolored and from this starting point
he worked out organic and metallic compounds which would destroy the
bacteria and parasites that cause some of the most dreadful of diseases.
A year after the war broke out Professor Ehrlich died while working in
his laboratory on how to heal with coal-tar compounds the wounds
inflicted by explosives from the same source.
One of the most valuable of the aniline antiseptics employed by Ehrlich
is flavine or, if the reader prefers to call it by its full name,
diaminomethylacridinium chloride. Flavine, as its name implies, is a
yellow dye and will kill the germs causing ordinary abscesses when in
solution as dilute as one part of the dye to 200,000 parts of water, but
it does not interfere with the bactericidal action of the white blood
corpuscles unless the solution is 400 times as strong as this, that is
one part in 500.


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