There are many unsavoury subjects which have to be considered in medical practice, especially when that is carried on among the insane. The lower animal nature in some patients shows itself often in all its simple beastliness. Yet we do not think, in England, at least, that it is well that such subjects should be fully considered in books which may be bought of any bookseller. Perhaps we are prudish, but we think that the production of this book by Ebing will not add to his reputation, nor will it do any possible good to the medical or the psychological world.