"Readers of Dr. Leffingwell's earlier books will expect to find this one written in the same quiet tone, with the same care and accuracy, and they will not be disappointed. The book begins with a history of vivisection in which the reader's chief suprise will be in finding that medical opinion a generation ago was much more humane than now. The humane protests of the last generation seem incredible to-day, when the profession almost to a man stands for the secvret and unlimited exploitation of animals."--S. N. Cleghorn, in Journal of Zoophily. "This book is devoted to a study and discussion of medical experimentation upon both man and animals. The writer is forced in his literary style, and has long commanded special attention on this particular subject. In a skilful and scholarly manner he treats of the historical development of the agitation in favour of restricted and regulated experimentation. The book should be read by every person interested in the discussion, whether in favour of restriction or not.... All who desire to be placed in touch with the latest word in regard to this important humanitarian question should secure a copy of Dr. Leffingwell's scholarly book."--National Humane Review. "Dr. Leffingwell analyzes the results of vivisection in America in a masterly way. Many methods of experimentation he finds not only extremely cruel, but valueless. For instance, the raising of the blood-pressure of a dog by scorching its paws, one after the other, so that the blood-pressure might be maintained for twenty minutes. `Of what possible value was such an experiment?' he asks. `Does anyone believe than in a human being, blood-pressure will ever be maintained by slowly scorching the hands and feet of the patient?' ... The matter is clearly presented, and is interesting to the layman as well as to the student of physiology."--Hartford Post. "The ethical problem of which Dr. Leffingwell writes in his interesting and instructive book, is that which arises from the prevailing practice of experimentation for scientific purposes upon animals and human beings.... The book discusses what vivisection is, and what have been the mistakes and abuses done in its name, as well as the present unhappy conditions which surround the practice. The author demonstrates that much of all this vivisection work is not only unnecessary, but absolutely valueless to science. The book is to be commended to all who would know something of what vivisection is, what it does, and what is being done and should still be done to prevent its present useless cruelty."--The Christian Register.