Neither does it seem fitting to preface these pages, or subtract one iota from their singleness of purpose, by introducing the ele ments of anatomy and physiology, a course so universally adopted by medical writers how ever special their subject may be, that we can now scarcely pick up from our area steps a printed handbill inviting sufferers of all classes to go and be cured by some universal nostrum without being treated to a full and compre hensive detail of the human system in all its tissues, organs and parts.