Note 237 — Chapter I

See on this subject the remarkable treatise of Alfred Binet, ‘On the Psychic Life of Micro-organisms,’ contained in the volume of extracts: ‘Le Fétichisme dans l’Amour (Etudes de Psychologie expérimentale). La Vie psychique des Micro-organismes, l’Intensité des Images mentales, le Problème hypnotique, Note sur l’Écriture hystérique.’ Paris, 1890.—A short time before Binet, this same subject was treated by Verworn in a very deserving manner, at once original and suggestive, in his Psycho-physiologische Protisten-Studien. Jena, 1889.