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PREFACE.

During the two sessions which have elapsed since the publication of this Manual, the sciences of Physiology and Pathology have made considerable progress, and the principal results will be found embodied in this edition; also advantage has been taken of suggestions by judicious critics, and by many teachers who have recommended it as a textbook to their classes. While my further experience has, I trust, enabled me to arrange the matter in a more intelligible and practical way, my object still has been "to express the leading facts of the science in as few words as possible, leaving them to be amplified, or freed from any obscurity, by the reflection of the reader or the expository powers of the lecturer."

The unusual course of appending questions upon the more essential points of each section, has been adopted with the hope that it may aid in diffusing a knowledge of that science, which of all others is best calculated to exalt the healing art.

In the second part of this manual, the alterations in physiological processes, which are wrought by disease and the influence of remedies upon them, are explained, though very briefly; and in another work I have striven to apply the principles of Physiology to the subject of the maintenance of the health and life of communities.

E. D. MAPOTHER.

125 Stephen's Green,

1st October, 1864.

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