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Lecture 10. Whole Subject of Spontaneous Movements and Sensibility in

Letters of Asa Gray · Asa Gray — chapter 6 of 7 · ~21 words · public domain

flowering plants, the life of plants, etc. (treated in a somewhat original way), and the real differences between plants and animals.

Letters of Asa Gray · The Wunder Library — complete classics, free to read, with narration.