Transcribed from the 1888 Cassell & Company edition by Jane Duff, proofed by David Price, email ccx074@pglaf.org. The Black Death and The Dancing Mania. FROM THE GERMAN OF J. F. C. HECKER. TRANSLATED BY B. G. BABINGTON. CASSELL & COMPANY, LIMITED: _LONDON_, _PARIS_, _NEW YORK & MELBOURNE_. 1888. INTRODUCTION Justus Friedrich Karl Hecker was one of three generations of distinguished professors of medicine. His father, August Friedrich Hecker, a most industrious writer, first practised as a physician in Frankenhausen, and in 1790 was appointed Professor of Medicine at the University of Erfurt. In 1805 he was called to the like professorship at the University of Berlin. He died at Berlin in 1811. Justus Friedrich Karl Hecker was born at Erfurt in January, 1795. He went, of course--being then ten years old--with his father to Berlin in 1805, studied at Berlin in the Gymnasium and University, but interrupted his studies at the age of eighteen to fight as a volunteer in the war for a renunciation of Napoleon and all his works. After Waterloo he went back to his studies, took his doctor's degree in 1817 with a treatise on the "Antiquities of Hydrocephalus," and became privat-docent in the Medical Faculty of the Berlin University. His inclination was strong from the first towards the historical side of inquiries into Medicine. This caused him to undertake a "History of Medicine," of which the first volume appeared in 1822. It obtained rank for him at Berlin as Extraordinary Professor of the History of Medicine. This office was changed into an Ordinary professorship of the same study in 1834, and Hecker held that office until his death in 1850. The office was created for a man who had a special genius for this form of study. It was delightful to himself, and he made it delightful to others. He is regarded as the founder of historical pathology. He studied disease in relation to the history of man, made his study yield to men outside his own profession an important chapter in the history of civilisation, and even took into account physical phenomena upon the surface of the globe as often affecting the movement and character of epidemics.