character: Julius von Sachs
topic: Evaporation and Humidity
grade: 9
subject: Science
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character: Julius von Sachs
topic: Plant Physiology and Water Transport
grade: 9
subject: Science
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character: Maximilian von Pettenkofer
topic: Humidity and its Effects on Health
grade: 9
subject: Science
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character: Richard Feynman
topic: The Science of Evaporation and Temperature Effects
grade: 9
subject: Science
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