拍品專文
Ingen-Housz's work on photosynthesis is thought to have been stimulated by Priestley's investigations. In this publication of his own, he "advanced the understanding of the subject considerably. He established that only the green parts of a plant can 'restore' the air, that they do this only when illuminated by sunlight, and that the active part of the sun's radiation is in the visible light and not in the heat radiation. In addition he found that plants, like animals, exhibit respiration, that respiration continues day and night, and that all parts of the plant -- green as well as nongreen, flowers and fruit as well as roots -- take part in the process" (DSB).