The purpose of this Atlas is to portray from the living subject, and in natural colour, a collection of the dermatoses most frequently seen in the routine of outpatient practice. Abbreviated clinical descriptions, the differential diagnoses where considered essential, and the routines of treatment are presented in an easily accessible position with regard to each plate. These should be considered as accessory to, and not substitutes for, the detailed study of actual cases, and it is believed that if they are employed with this reservation, they will afford valuable help in diagnosis. The more experienced may utilize them as aides mémoires, and will be able at the same time to refresh their recollections of differential diagnosis and the established lines of treatment. To facilitate rapid reference, the various diseases have been grouped in alphabetical order, with the exception of some of the less common, which are arranged at the end. - Preface.