When you’re sick, you’ll often produce more phlegm, and might notice it’s thicker or a different colour: white, green, yellow or maybe even brown. What can this phlegm – also called mucus, snot, ...

Based on: Autumnal Catarrh (Hay Fever), with Illustrative Maps. By Morrill Wyman, M. D., late Hersey Professor Adjunct of the Theory and Practice of Medicine in Harvard University, etc., etc. New York ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. The indications or uses for this ...