First published in 1863, "Nature's Secrets or Psychometric Researches" is a vintage treatise on Psychometrics, a field of study that deals with psychological measurement. In this book, Denton explores the subject in great detailed with reference to mesmerism, telepathy, spiritualism, and other related subjects. Contents include: "How Objects are Seen Psychometrically", "Seen Best in Darkness, and With Closed Eyes", "Why Called Sight", "Mesmeric Influence...