According to the author, this monograph is written to give the general practitioner an intelligent attitude concerning the diagnosis and treatment of prostatic obstruction. It is an admirable vehicle for this purpose. It begins with a brief introduction to the anatomy and physiology of the prostate gland and a description of consequent changes in the urinary tract. This is followed by an outline of a clinical examination of the patient, including the history, general examination, urinalysis and rectal examination. After a description of technic of bladder catheterization, the roentgenologic examination and the various methods of determining renal function are outlined. This is followed by a discussion of the general treatment of the patient and the treatment of urinary infection. The author refers to the usual methods of removing prostatic obstruction, namely, suprapubic prostatectomy and transurethral resection. In his opinion, transurethral resection should be done early, while the gland is small.