CONTENTS Organ Systems The Blood As a Human Organ, Part I. Hans Broder von Laue 1 Infectious Diseases Post-influenzal Encephalitis Gisbert Husemann 32 HIB Vaccination and the Incidence of Acute Bacterial Meningitis.. Karl-Reinhard Kummer Environment 36 How Human Beings Relate to the Geological Base Cornelis Bockemuehl Medicinal Substances The Essential Nature of Fluorine. Otto Wolff 38 N. Intercostalis and Bryonia for Posttraumatic Back Pain Franziska Roemer 57 T. Schwenk's Viscum Preparation in Clinical Use Hedwig Erasmy 58 Karma and Illness Destiny of Illness and Inner Human Development. RudolfSteiner Case Reports Childhood Asthma. Christoph Tautz Treatment of Graves' Disease. 65 68 Reports.. 50 Calendar of Events. Hans Werner 71 Clinical Work Continues in Romania, C. Paxino; Open Dialogue with Scientists and Industrialists, A. Weigel 73 Book Review.. Register of Anthroposophical Journals 1926–1994, M. Weckenmann 76 77