Small type has been used rather to supply headings than for the purpose of indicating less important matter because in a book so condensed it has not seemed advisable to present any subject not of practical value. This book is written from the standpoint of the teacher who aims not only to give the essential points but to present them in a manner so cross-referenced that the student has the subject presented to him from every angle. It has been my custom in preparing my lectures to abstract the various works on tropical medicine in order that special points in one book, not noted in the others, would stand out prominently. In this connection I am deeply indebted to the manuals of Manson, Scheube, Castellani and Chalmers, LeDantec, Jeanselme and Rist as well as to the monographs in Maladies Exotiques, Albutt’s System of Medicine, Osler’s System of Medicine, Mense’s Tropenkrankheiten and Traite Pratique de Pathologie Exotique. In particular I am indebted to Ruge and zurVerth’s Tropenkrankheiten, to Brumpt’s Precis de Parasitologie and to the only work in the diagnosis of tropical diseases I have been able to obtain, that of Wurtz and Thiroux, entitled Maladies Tropicales. In the section on blood examination I have advocated the adoption of the scheme of differential counting brought out in Schilling-Torgau’s work on the blood in tropical diseases. I have freely consulted the various journals dealing with the subject of tropical medicine as to recent advances in this branch of medicine and I would particularly express my indebtedness to the Tropical Diseases Bulletin which should be in the hands of every student of tropical medicine, not only as an index to original papers but as a guide as to the advisability of consulting such papers. These abstracts are prepared by authorities in the different tropical diseases and many of the abstracts indicate the value or lack of value of the paper abstracted. The tropical diseases are classified under those due to protozoa, those due to bacteria, those due to filterable viruses, infectious granulomata and tropical skin diseases. Sprue is classified as a food deficiency disease for the reason that the cure seems to rest solely in dietary treatment. Certain diseases which did not definitely belong to any of the above-named sections were taken up under diseases of disputed nature or minor importance. The second part of the book deals with the clinical diagnosis of tropical diseases. CONTENTS PART I TROPICAL DISEASES AND THEIR TREATMENT DISEASES DUE TO PROTOZOA CHAPTER I.—Malaria, 1. CHAPTER II.—Blackwater fever, 55. CHAPTER III.—The trypanosomiases, 66; African trypanosomiasis, 66; Brazilian trypanosomiasis, 80; Animal trypanosomiases, 84. CHAPTER IV.—The tropical relapsing fevers, 86. CHAPTER V.—Yellow fever, 97. CHAPTER VI.—Infectious jaundice, 114. CHAPTER VII.—Rat bite fever, 118.