The Science of Breath and the Philosophy of the Tattvas. The Tattvas are the five modifications of the Great Breath or the central impulse which keeps matter in a certain vibratory state. The book was translated from the Sanskrit in 1894, showing the religion of ancient India had a scientific basis. Contents include: The Tattvas, Evolution, The Mutual Relation of the Tattvas and of the Principles, Prâna, The Mind, The Cosmic Picture-Gallery, The Manifestations of Psychic Force, Yoga-The Soul, The Spirit, and The Science of Breath.

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