The question that has never been answered, and which perhaps never will be answered, does not find a solution in Mrs. Gaskell's contribution. It does, however, receive at her hands an exceedingly interesting discussion. She proposes an attempt to discover what it is that passes from the body at the time of death, with a belief that a measurement of this quantity will establish the difference between life and death. Her subject and the nature of her presentation have aroused the interest of the physicists and the biologists. The presentation of the volume by the new Thomas press is all that could be asked of modern publishing. It has a fine binding, beautiful type on an artistically arranged page, an introduction, a good glossary and an index.