Excerpt from Chemical and Microscopical Diagnosis
It is not necessary in the present state of medical knowledge to call attention to the importance of the results obtained by the microscopical and chemical examination of the blood and the secretions and excretions of the body, as an aid to diagnosis, for the physician is not as yet sufficiently equipped with diagnostic methods to be able to neglect the study of any phenomena which may lead to a knowledge of disease.
The facts obtained in the laboratory may occasionally be of more value than those secured by the physical examination of the patient; they more often possess a corroborative force ranking with the observations procured by the stethoscope and eye; occasionally they have merely a scientific worth and are relatively unimportant from a point of view of an immediate diagnosis.
In this volume, which represents the author's experience in hospital work and teaching of clinical pathology, the attempt is made to indicate not only the proper technique of the methods of laboratory diagnosis, but also to emphasize the relative value of the procedures and the practical importance of the knowledge so obtained. The writer hopes that the results may be of value to the students of medicine, hospital internes, and practitioners for whom this book has been written.
The author takes pleasure in acknowledging the many helpful suggestions which he owes to Professor T. Mitchell Prudden during the progress of this work and also in expressing his indebtedness to Professor P.Hanson Hiss and Dr. Charles Norris for aid in revision of several sections; to Dr. E. Libman for numerous blood slides from his large collection; to Drs. E. H. Pool and T. S. Hart for permission to reproduce specimens; and to Dr. Edward Leaming for many of the photographs. The writer's thanks are also due Miss S. M. Wood for her most valuable assistance in proof correction and in the preparation of the index.
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