PREFACE TO THE FIFTH EDITION.

Owing to the favour in which this work is still being held by the public in India, as proved by the entire sale of the Fourth Edition, I have taken upon myself to issue this, the Fifth Edition, with the generous assistance of my late father's friend, J. E. T. Aitchison, M.D., C.I.E., to whom I owe a great debt of gratitude for the time and trouble and valuable special knowledge he has so liberally bestowed on the work.

The only important changes that occur in this Edition are the introduction of a couple of diagrams of a clinical thermometer, with a few notes to guide the non-professional in its use; some alterations in the text, where subjects that had been issued in the Fourth Edition as notes to the text are now incorporated in the text itself; and lastly, Dr. Aitchison has more fully entered upon his treatment of small-pox with carbolised oil.

C. WARING.