De Angina Polyposa Sive Membranacea is a medical book written by Christian Friedrich Michaelis in 1778. The book focuses on the condition known as angina membranacea, which is characterized by the formation of a membrane in the throat that can cause difficulty breathing and swallowing. Michaelis provides a detailed description of the symptoms, causes, and treatment options for this condition. He also includes case studies of patients he has treated,...