Our readers will see, when we add that the book is made up of examples such as have been given above, that its pages open up fair ground for free discussion. Some who would agree with the author in his experimental facts would possibly disagree with him in some of the inferences which he draws from them. We could, in fact, open controversy on almost every point, but our object is rather to give an idea, however brief, of the volume as an argumentative treatise, and to commend it as the offspring of a thoughtful and original mind."- London MEDICAL TIMES AND GAZETTE.

"It contains many suggestive and highly valuable remarks upon a class of the most important diseases, those affecting the circulation. *** We can cordially recommend this volume to the notice of our readers, as the production in an especial manner of a very thoughtful and enlightened physician."-THE BRITISH AND FOREIGN MEDICO-CHIRURGICALREVIEW. "We cannot afford room to indulge in a further sufficiently detailed notice of the many interesting topics contained in this

papers are pervaded by the same philosophical spirit which may be recognised in those whose substance we have thus imperfectly endeavoured to condense. It is too much the practice in late times to view facts and observations alone as objects of science, and in no department is this more applicable than in physiology. We have no lack of observers; they are to be found everywhere. The accumulated experience of the normal and abnormal phenomena of life,-phenomena which are registered with an accuracy and minuteness scarcely accorded to other sciences,has attained a growth so ponderous as almost to overburden the minds of more ordinary observers, while to the many revelations regarding the varieties of structural arrangement, the microscope has been recently adding its contributions to a subject already sufficiently complicated and abstruse. And yet, how few general laws, how few adaptations of structure to function, have been discovered; how little do we know of the mere mechanical arrangements of animal life! Refreshing, therefore, is it to meet now and again with a work like that before us, breathing, as it does, a true spirit of calm philosophy, worthy of a follower of Harvey." THE DUBLIN QUARTERLY JOURNAL OF MEDICAL SCIENCE.