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1917. — Scheppegrell, W. " The Classificaition of Hav Fever Pollens from 

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1917. — Scheppegrell, W. " Hay Fever : Its Cause and Prevention in the 

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1917. — Scheppegrell, W. " Hay-Fever and Hay-Fever Pollens." — Archives 

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1919.— Scheppegrell, W. " The Treatment of Hay Fever.— f'..S'. Public 

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1919. — Potts, G. " The Pepper Tree (Schinus molle) in its Relation 

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