Le sommeil, tiers de notre vie. Pathologie, physiologie, hygiène, psychologie. Traduit de Russe avec l'autorisation de l'auteur par Ernest Jaubert.

Perhaps the first book on the physiology of sleep. The author examines the physiology, pathology, hygiene, and psychology of sleep, including the differences between the waking and sleeping states, the general phenomena of sleep, reflex movements, the brain during sleep, talking in sleep, attention during sleep, theories of sleep, the fear of darkness, the influence of light, dreams, etc.

Digital facsimile from Google Books at this link. Translated into English as Sleep: Its physiology, pathology, hygiene, and psychology. London: Walter Scott Ltd., 1897. Digital facsimile of the English translation from the Internet Archive at this link.