by George Catlin. 1882. 102p

The text discusses the importance of maintaining a habit of sleeping with the mouth shut, as observed in both the animal kingdom and among indigenous peoples, contrasting it with the practices of civilized societies. It suggests that the open-mouth habit prevalent in modern life contributes to higher mortality rates and health issues, while those who keep their mouths closed tend to experience better health outcomes. The author emphasizes that by adopting this simple practice, individuals can significantly improve their well-being and potentially lead to a healthier future for humanity.