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wood prints black and white wood prints portrait wood prints clothing wood prints engraving wood prints research wood prints robert koch wood prints scientist wood prints tuberculosis bacterium wood prints doctor wood prints dress wood prints moor wood prints scientific experiment wood prints horizontal wood prints laboratory wood prints nobel prize wood prints

drawings black and white drawings portrait drawings clothing drawings engraving drawings research drawings robert koch drawings scientist drawings tuberculosis bacterium drawings doctor drawings dress drawings moor drawings scientific experiment drawings horizontal drawings laboratory drawings nobel prize drawings

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Robert Koch (1843-1910, German bacteriologist and physician in his laboratory. In 1890 Koch introduced Tuberculin which he thought a cure for Tuberculosis. Curative powers disappointing and its value as diagnostic tool overlooked. Engraving, 1891. (Photo by Ann Ronan Pictures/Print Collector/Getty Images)

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