1882-became Titular Professor

1887-qualified as a result of his thesis “Das Saverstoffbedürfnis Des Organisms” (The Need Of The Organism For Oxygen)

1890-became Robert Kochs assistant startted studies on immunological studies

End Of 1896-appointed theraputic Sera in Stegiltz

1897-appoined public health officer at Frankfort Am Main

Became Main Founder Of Chemotherapy But Later Became Concerned With Experiment Of the Tissue……